1994
Bergey, E. A.; Resh, V. H.
Effects of burrowing by a stream caddisfly on case-associated algae Journal Article
In: Journal of the North American Benthological Society, vol. 13, no. 3, pp. 379-390, 1994.
Abstract | Links | BibTeX | Tags: burrowing, caddisflies cases, diatoms, diel periodicity, Gumaga, rifigia, streams, Trichoptera
@article{Bergey1994,
title = {Effects of burrowing by a stream caddisfly on case-associated algae},
author = {E. A. Bergey and V. H. Resh},
url = {https://angelo.berkeley.edu/wp-content/uploads/sites/59/Bergey_1994_JorBenthSoc.pdf},
doi = {10.2307/1467367},
year = {1994},
date = {1994-09-00},
journal = {Journal of the North American Benthological Society},
volume = {13},
number = {3},
pages = {379-390},
abstract = {Diel burrowing behavior of Gumaga nigricula (McL.) (Trichoptera:Sericostomatidae) was investigated in Big Sulphur Creek (Sonoma Co., California). Most of the population burrows during the day and surfaces at night, a behavior that facilitates feeding on periphyton while retaining many of the advantages of burrowing (e.g., protection from predators). Because of daytime burrowing, case algae (primarily diatoms) are potentially light-limited by overlying substrate and, indeed, chlorophyll a concentrations on stream-collected cases and diatom colonization on cleaned cases increased dramatically when daytime burrowing was prevented. Cases and case-associated algae are normally abraded during burrowing; therefore experimental abrasion had little effect. However, after cases were cultured to accrue algae, experimental abrasion drastically reduced the accrued algae. Blue-green algal filaments and diatoms were removed from exposed surfaces but were protected in crevices between sand grains. Comparison of cases of different caddisfly genera showed a trend between abrasion level and case-associated algae. Under low abrasion, grazer-resistant diatoms occurred on exposed surfaces and upright diatoms occurred in crevices (e.g., Glossosoma and Discosmoecus cases). As abrasion increased, diatoms were lost from exposed surfaces, although they remained in crevices (e.g., Gumaga cases); with continuous burrowing, cases were nearly devoid of algae (e.g., Agarodes cases)},
keywords = {burrowing, caddisflies cases, diatoms, diel periodicity, Gumaga, rifigia, streams, Trichoptera},
pubstate = {published},
tppubtype = {article}
}
Diel burrowing behavior of Gumaga nigricula (McL.) (Trichoptera:Sericostomatidae) was investigated in Big Sulphur Creek (Sonoma Co., California). Most of the population burrows during the day and surfaces at night, a behavior that facilitates feeding on periphyton while retaining many of the advantages of burrowing (e.g., protection from predators). Because of daytime burrowing, case algae (primarily diatoms) are potentially light-limited by overlying substrate and, indeed, chlorophyll a concentrations on stream-collected cases and diatom colonization on cleaned cases increased dramatically when daytime burrowing was prevented. Cases and case-associated algae are normally abraded during burrowing; therefore experimental abrasion had little effect. However, after cases were cultured to accrue algae, experimental abrasion drastically reduced the accrued algae. Blue-green algal filaments and diatoms were removed from exposed surfaces but were protected in crevices between sand grains. Comparison of cases of different caddisfly genera showed a trend between abrasion level and case-associated algae. Under low abrasion, grazer-resistant diatoms occurred on exposed surfaces and upright diatoms occurred in crevices (e.g., Glossosoma and Discosmoecus cases). As abrasion increased, diatoms were lost from exposed surfaces, although they remained in crevices (e.g., Gumaga cases); with continuous burrowing, cases were nearly devoid of algae (e.g., Agarodes cases)