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Stream insects

Throughout the summer, several taxa of larval insects are collected from each stream via two methods: scrubbing of streambed rocks and sampling by drift net. Insect samples are then classified and measured on digitizing pads. Insects are collected from both fertilized and control sections of the streams, allowing us to examine if the nutrient additions affect insect growth and density. There are files with information for several groups of larval insects: mayflies (Baetis, Cinygmula, and "Baetis species 3"), chironomids (Orthocladius and Natarsia), blackflies (primarily Prosimulium; grouped as Small blackflies and Large blackflies), caddisflies (Rhyacophila and Brachycentrus), and stoneflies (Nemoura). Dr. Anne Hershey is the principal investigator in charge of insect studies.

The menu below provides a complete list of stream insect files. Consult the brief descriptor following each file name for the information contained in each file. Clicking on a file name will send you to a document file that describes the method in which the data were collected; from the document file, you can access the data file by clicking on the hypertext data file name.


  • 01ADHKB - Total numbers per square meter and taxa of insects taken from the Kuparuk River during the summer of 2001.

  • 01ADHSSB - Total numbers per square meter and taxa of insects taken during a survey of headwater streams in the Toolik Lake region during the summer of 2001.

  • 84-88hektot - Total numbers and species of insects taken from the Kuparuk River rock scrubbings during the summer of 1984-1988.

  • 89hekbae - This is a Kuparuk River bottom sample. The file simply lists the length of each insect measured, as well as when and where along the river it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a particular insect, found from a replicate at a station, then that station isn't listed either. This is captured baetis.

  • 89hekbra - This is a Kuparuk River bottom sample. The files simply list the length of each insect measured, as well as when and where along the river it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a particular insect, found from a replicate at a station, then that station isn't listed either. This is captured brachycentrus.

  • 89hekcin - This is a Kuparuk River bottom sample. The file simply lists the length of each insect measured, as well as when and where along the river it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a particular insect, found from a replicate at a station, then that station isn't listed either. This is captured cinygmula.

  • 89hekdis - This file contains total numbers of the 22 different types of critters (depending on species, size, maturity, or all three) caught from the two drift distance experiments on the Kuparuk River in 1989. One experiment was on 7 July 1989 at the -500m station, the other was on 10 July 1989 at the 1.7km station.

  • 89heklbf - This is a Kuparuk River bottom sample. The file simply lists the length of each insect measured, as well as when and where along the river it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a particular insect, found from a replicate at a station, then that station isn't listed either. This is captured large black flies.

  • 89heknat - This is a Kuparuk River bottom sample. The file simply lists the length of each insect measured, as well as when and where along the river it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a particular insect, found from a replicate at a station, then that station isn't listed either. This is captured natarsia.

  • 89hekort - This is a Kuparuk River bottom sample. The file simply lists the length of each insect measured, as well as when and where along the river it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a particular insect, found from a replicate at a station, then that station isn't listed either. These are captured orthocladius.

  • 89hekrhy - This is a Kuparuk River bottom sample. The file simply lists the length of each insect measured, as well as when and where along the river it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a particular insect, found from a replicate at a station, then that station isn't listed either. These are captured rhyacophila.

  • 89heksbf - This is a Kuparuk River bottom sample. The file simply lists the length of each insect measured, as well as when and where along the river it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a particular insect, found from a replicate at a station, then that station isn't listed either. These are captured small black flies.

  • 89heksp3 - This is a Kuparuk River bottom sample. The file simply lists the length of each insect measured, as well as when and where along the river it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a particular insect, found from a replicate at a station, then that station isn't listed either. These are captured "baetis species 3".

  • 89hektot - Total numbers and species of insects taken from the Kuparuk River rock scrubbings during the summer of 1989.

  • 89heobad - This is Oksrukuyuk Creek drift. The files simply list the length of each insect measured, as well as when and where along the creek it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a paticular insect found at a replicate at a station, then that station isn't listed either. This file lists captured baetis.

  • 89heobae - This is an Oksrukuyuk Creek bottom sample. The file simply lists the length of each insect measured, as well as when and where along the creek it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a particular insect found from a replicate at a station, then that station isn't listed either. This file is captured baetis.

  • 89heobra - This is an Oksrukuyuk Creek bottom sample. The file simply lists the length of each insect measured, as well as when and where along the creek it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a particular insect found from a replicate at a station, then that station isn't listed either. This is captured brachycentrus.

  • 89heobrd - This is Oksrukuyuk Creek drift. The files simply list the length of each insect measured, as well as when and where along the creek it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a paticular insect found at a replicate at a station, then that station isn't listed either. This file lists captured brachycentrus.

  • 89heocin - This is an Oksrukuyuk Creek bottom sample. The file simply lists the length of each insect measured, as well as when and where along the creek it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a particular insect found from a replicate at a station, then that station isn't listed either. This is captured cinygmula.

  • 89heolbd - This is Oksrukuyuk Creek drift. The files simply list the length of each insect measured, as well as when and where along the creek it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a paticular insect found at a replicate at a station, then that station isn't listed either. This file lists captured large black flies.

  • 89heolbf - This is an Oksrukuyuk Creek bottom sample. The file simply lists the length of each insect measured, as well as when and where along the creek it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a particular insect found from a replicate at a station, then that station isn't listed either. This is captured large black flies.

  • 89heonad - This is Oksrukuyuk Creek drift. The files simply list the length of each insect measured, as well as when and where along the creek it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a paticular insect found at a replicate at a station, then that station isn't listed either. This file lists captured natarsia.

  • 89heonat - This is an Oksrukuyuk creek bottom sample. The file simply lists the length of each insect measured, as well as when and where along the creek it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a particular insect found from a replicate at a station, then that station isn't listed either. This is captured natarsia.

  • 89heoned - This is Oksrukuyuk Creek drift. The files simply list the length of each insect measured, as well as when and where along the creek it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a paticular insect found at a replicate at a station, then that station isn't listed either. This file lists captured nemoura.

  • 89heonem - This is an Oksrukuyuk Creek bottom sample. The file simply lists the length of each insect measured, as well as when and where along the creek it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a particular insect found from a replicate at a station, then that station isn't listed either. This is captured nemoura.

  • 89heoord - This is Oksrukuyuk Creek drift. The files simply list the length of each insect measured, as well as when and where along the creek it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a paticular insect found at a replicate at a station, then that station isn't listed either. This file lists captured orthocladius.

  • 89heoort - This is an Oksrukuyuk Creek bottom sample. The file simply lists the length of each insect measured, as well as when and where along the creek it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a particular insect found from a replicate at a station, then that station isn't listed either. This is captured orthocladius.

  • 89heorhd - This is Oksrukuyuk Creek drift. The files simply list the length of each insect measured, as well as when and where along the creek it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a paticular insect found at a replicate at a station, then that station isn't listed either. This file lists captured rhyacophila.

  • 89heorhy - This is an Oksrukuyuk Creek bottom sample. The file simply lists the length of each insect measured, as well as when and where along the creek it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a particular insect found from a replicate at a station, then that station isn't listed either. This is captured rhyacophila.

  • 89heos3d - This is Oksrukuyuk Creek drift. The files simply list the length of each insect measured, as well as when and where along the creek it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a paticular insect found at a replicate at a station, then that station isn't listed either. This file lists captured "baetis species 3".

  • 89heosbd - This is Oksrukuyuk Creek drift. The files simply list the length of each insect measured, as well as when and where along the creek it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a paticular insect found at a replicate at a station, then that station isn't listed either. This file lists captured small black flies.

  • 89heosbf - This is an Oksrukyuk Creek bottom sample. The file simply lists the length of each insect measured, as well as when and where along the creek it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a particular insect found from a replicate at a station, then that station isn't listed either. This is captured small black flies.

  • 89heosp3 - This is an Oksrukuyuk Creek bottom sample. The file simply lists the length of each insect measured, as well as when and where along the creek it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a particular insect found from a replicate at a station, then that station isn't listed either. This is captured "baetis species 3".

  • 89heotod - Total numbers and species of insects taken from the Oksrukuyuk Creek drift samples during the summer of 1989

  • 89heotot - Total numbers and species of insects taken from the Oksrukuyik River rock scrubbings taken during the summer of 1989.

  • 90hekbad - This is Kuparuk River drift. The insects are baetis. The file simply lists the length of each insect measured, as well as when and where along the river it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a particular insect found from a replicate at a station, then that station isn't listed either. This file is for baetis

  • 90hekbae - This is a Kuparuk River rock- scrubbing. The insects are baetis. The file simply lists the length of each insect measured, as well as when and where along the river it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a particular insect found from a replicate at a station, then that station isn't listed either. This file is for baetis.

  • 90hekbra - This is a Kuparuk River rock- scrubbing. The insects are brachycentrus. The file simply lists the length of each insect measured, as well as when and where along the river it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a particular insect found from a replicate at a station, then that station isn't listed either. This file is for brachycentrus.

  • 90hekbrd - This is Kuparuk River drift. The insects are brachycentrus. The file simply lists the length of each insect measured, as well as when and where along the river it was captured. Only the actual measurements of the insects are listed. For example, if there wasn't a particular insect found from a replicate at a station, then that station isn't listed either. This file is for brachycentrus.

  • 90hekcid - This is Kuparuk River drift. The insects are cinygmula. The file simply lists the length of each insect measured, as well as when and where along the river it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a particular insect found from a replicate at a station, then that station isn't listed either. This file is for cinygmula.

  • 90hekcin - This is a Kuparuk River rock- scrubbing. The insects are cinygmula. The file simply lists the length of each insect measured, as well as when and where along the river it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a particular insect found from a replicate at a station, then that station isn't listed either. This file is for cinygmula.

  • 90heklbf - This is a Kuparuk River rock- scrubbing. The insects are large black flies. The file simply lists the length of each insect measured, as well as when and where along the river it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a particular insect found from a replicate at a station, then that station isn't listed either. This file is for large black fly.

  • 90heklfd - This is Kuparuk River drift. The insects are large black flies. The file simply lists the length of each insect measured, as well as when and where along the river it was captured. Only the actual measurements of the insects are listed. For example, if there wasn't a particular insect found from a replicate at a station, then that station isn't listed either. This file is for Large black flies.

  • 90heknad - This is Kuparuk River drift. The insects are natarsia. The file simply lists the length of each insect measured, as well as when and where along the river it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a particular insect found from a replicate at a station, then that station isn't listed either. This file is for natarsia.

  • 90heknat - This is a Kuparuk River rock- scrubbing. The insects are natarsia. The file simply lists the length of each insect measured, as well as when and where along the river it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a particular insect found from a replicate at a station, then that station isn't listed either. This file is for natarsia.

  • 90hekned - This is Kuparuk River drift. The insects are nemoura. The file simply lists the length of each insect measured, as well as when and where along the river it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a particular insect found from a replicate at a station, then that station isn't listed either. This file is for nemoura.

  • 90hekord - This is Kuparuk River drift. The insects are orthocladius. The file simply lists the length of each insect measured, as well as when and where along the river it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a particular insect found from a replicate at a station, then that station isn't listed either. This file is for orthocladius.

  • 90hekort - This is a Kuparuk River rock- scrubbing. The insects are orthocladius. The file simply lists the length of each insect measured, as well as when and where along the river it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a particular insect found from a replicate at a station, then that station isn't listed either. This file is for orthocladius.

  • 90hekrhy - This is a Kuparuk River rock- scrubbing. The insects are rhyacophilia. The file simply lists the length of each insect measured, as well as when and where along the river it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a particular insect found from a replicate at a station, then that station isn't listed either. This file is for rhyacophila.

  • 90heks3d - This is Kuparuk River drift. The insects are "baetis species 3". The file simply lists the length of each insect measured, as well as when and where along the river it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a particular insect found from a replicate at a station, then that station isn't listed either. This file is for baetis species 3

  • 90heksbf - This is a Kuparuk River rock- scrubbing. The insects are small black flies. The file simply lists the length of each insect measured, as well as when and where along the river it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a particular insect found from a replicate at a station, then that station isn't listed either. This file is for small black fly.

  • 90heksfd - This is Kuparuk River drift. The insects are small black flies. The file simply lists the length of each insect measured, as well as when and where along the river it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a particular insect found from a replicate at a station, then that station isn't listed either. This file is for small black fly.

  • 90heksp3 - This is a Kuparuk River rock- scrubbing. The insects are "baetis species 3". The file simply lists the length of each insect measured, as well as when and where along the river it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a particular insect found from a replicate at a station, then that station isn't listed either. This file is for baetis species 3.

  • 90hektod - Total numbers and species of insects taken from the Kuparuk River drift samples during the summer of 1990.

  • 90hektot - Total numbers and species of insects taken from the Kuparuk River rock scrubbings during the summer of 1990.

  • 90heobad - This is Oksrukuyuk Creek drift. The file simply lists the length of each insect measured, as well as when and where along the creek it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a particular insect found from a replicate at a station, then that station isn't listed either. These are captured baetis.

  • 90heobae - This is an Oksrukuyuk Creek bottom sample. The file simply lists the length of each insect measured, as well as when and where along the creek it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a particular insect found from a replicate at a station, then that station isn't listed either. These are captured baetis.

  • 90heobra - This is an Oksrukuyuk Creek bottom sample. The file simply lists the length of each insect measured, as well as when and where along the creek it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a particular insect found from a replicate at a station, then that station isn't listed either. These are captured brachycentrus.

  • 90heobrd - This is Oksrukuyuk Creek drift. The file simply lists the length of each insect measured, as well as when and where along the creek it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a particular insect found from a replicate at a station, then that station isn't listed either. These are captured brachycentrus.

  • 90heocid - This is Oksrukuyuk Creek drift. The file simply lists the length of each insect measured, as well as when and where along the creek it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a particular insect found from a replicate at a station, then that station isn't listed either. These are captured cinygmula.

  • 90heocin - This is an Oksrukuyuk Creek bottom sample. The file simply lists the length of each insect measured, as well as when and where along the creek it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a particular insect found from a replicate at a station, then that station isn't listed either. These are captured cinygmula.

  • 90heolbf - This is an Oksrukuyuk Creek bottom sample. The file simply lists the length of each insect measured, as well as when and where along the creek it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a particular insect found from a replicate at a station, then that station isn't listed either. These are captured large black flies.

  • 90heolfd - This is Oksrukuyuk Creek drift. The file simply lists the length of each insect measured, as well as when and where along the creek it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a particular insect found from a replicate at a station, then that station isn't listed either. These are captured large black flies.

  • 90heonad - This is Oksrukuyuk Creek drift. The file simply lists the length of each insect measured, as well as when and where along the creek it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a particular insect found from a replicate at a station, then that station isn't listed either. These are captured natarsia.

  • 90heonat - This is an Oksrukuyuk Creek bottom sample. The file simply lists the length of each insect measured, as well as when and where along the creek it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a particular insect found from a replicate at a station, then that station isn't listed either. These are captured natarsia.

  • 90heoned - This is Oksrukuyuk Creek drift. The file simply lists the length of each insect measured, as well as when and where along the creek it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a particular insect found from a replicate at a station, then that station isn't listed either. These are captured nemoura.

  • 90heonem - This is an Oksrukuyuk Creek bottom sample. The file simply lists the length of each insect measured, as well as when and where along the creek it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a particular insect found from a replicate at a station, then that station isn't listed either. These are captured nemoura.

  • 90heoord - This is Oksrukuyuk Creek drift. The file simply lists the length of each insect measured, as well as when and where along the creek it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a particular insect found from a replicate at a station, then that station isn't listed either. These are captured orthocladius.

  • 90heoort - This is an Oksrukuyuk Creek bottom sample. The file simply lists the length of each insect measured, as well as when and where along the creek it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a particular insect found from a replicate at a station, then that station isn't listed either. These are captured orthocladius.

  • 90heoryd - This is Oksrukuyuk Creek drift. The file simply lists the length of each insect measured, as well as when and where along the creek it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a particular insect found from a replicate at a station, then that station isn't listed either. These are captured rhyacophila.

  • 90heoryh - This is an Oksrukuyuk Creek bottom sample. The file simply lists the length of each insect measured, as well as when and where along the creek it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a particular insect found from a replicate at a station, then that station isn't listed either. These are captured rhyacophila.

  • 90heos3d - This is Oksrukuyuk Creek drift. The file simply lists the length of each insect measured, as well as when and where along the creek it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a particular insect found from a replicate at a station, then that station isn't listed either. These are captured "baetis species 3".

  • 90heosbf - This is an Oksrukuyuk Creek bottom sample. The file simply lists the length of each insect measured, as well as when and where along the creek it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a particular insect found from a replicate at a station, then that station isn't listed either. These are captured small black flies.

  • 90heosfd - This is Oksrukuyuk Creek drift. The file simply lists the length of each insect measured, as well as when and where along the creek it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a particular insect found from a replicate at a station, then that station isn't listed either. These are captured small black flies.

  • 90heosp3 - This is an Oksrukuyuk Creek bottom sample. The file simply lists the length of each insect measured, as well as when and where along the creek it was captured. Only the actual measurements of the insects are listed, for example, if there wasn't a particular insect found from a replicate at a station, then that station isn't listed either. These are captured "baetis species 3".

  • 90heotod - Total numbers and species of insects taken from the Oksrukuyuk Creek DRIFT samples during the summer of 1990

  • 90heotot - Total numbers and species of insects taken from the Oksrukuyuk Creek rock scrubbings during the summer of 1990

  • 91hekb - Total numbers, measurements, and species of insects taken from the Kuparuk River rock scrubbings during the summer of 1991.

  • 91heob - Total numbers, measurements and species of insects taken from the Oksrukuyuk Creek rock scrubbings during the summer of 1991.

  • 91heod - Total numbers, measurements and species of insects taken from the Oksrukuyuk Creek DRIFT samples during the summer of 1991.

  • 91sckfly - del 13C and del 15N ratios were measured for black fly larvae collected from the control and fertilized reaches of the Kuparuk River.

  • 92hekb - Total numbers, measurements, and species of insects taken from the Kuparuk River rock scrubbings during the summer of 1992.

  • 92heob - Total numbers, measurements and species of insects taken from the Oksrukuyuk Creek rock scrubbings during the summer of 1992.

  • 92heod - Total numbers, measurements and species of insects taken from the Oksrukuyuk Creek DRIFT samples during the summer of 1992.

  • 93-94hektot - Total numbers and species of insects taken from the Kuparuk River rock scrubbings during the summer of 1993-1994.

  • 93heob - Total numbers, measurements and species of insects taken from the Oksrukuyik Creek rock scrubbings during the summer of 1993.

  • 94heob - Total numbers, measurements and species of insects taken from the Oksrukuyik Creek rock scrubbings during the summer of 1994.

  • 95hekb - Insect data from Kuparuk River rock scrubs, 15 Jul 95 and 27 Jul 95. Includes total numbers, length measurements, and genus.

  • 95heob - Insect data from Oksrukuyik Creek rock scrubs, 2 August 1995. Includes total numbers, length measurements, and genus.

  • 96-98hektot - Total numbers and species of insects taken from the Kuparuk River rock scrubbings during the summer of 1996-1998.

Please contact arc_im@mbl.edu with questions, comments, or for technical assistance regarding this web site.