EARLY HEARING DETECTION AND INTERVENTION VIRTUAL CONFERENCE
MARCH 2-5, 2021
(Virtually the same conference, without elevators, airplane tickets, or hotel room keys)
5/20/2019 | 2:30 PM - 2:45 PM | DIVERSITY AND BIOMASS OF SHREDDER INSECTS ALONG AN ALTITUDINAL GRADIENT IN CENTRAL AMERICA | 250 DE
DIVERSITY AND BIOMASS OF SHREDDER INSECTS ALONG AN ALTITUDINAL GRADIENT IN CENTRAL AMERICA
Shredder aquatic insects richness is generally low in tropical streams, possibly because of low quality leaf litter. However, richness varies highly among streams, suggesting that environmental filtering is driving shredders diversity. Here, we evaluate how much richness and biomass of shredder insects increase along an altitudinal gradient (170 - 2000 m asl). We conducted a quantitative sampling in first order streams, located in conserved catchments of Guatemalan basins. Vegetation ranges from rainy neotropical forest to cloud forest; however, leaf litter quality did not seem increase with altitude (SLA: 2.62 – 4.36 cm2 mg-1). Shredder insects richness was a low proportion of the assemblage (9 of 69 taxa), and increased with altitude. Although biomass in streams at lower altitude (8.32 mg AFDM m-2) was less than a 5% of the biomass at higher altitude (218.53 mg AFDM m-2), the highest biomass was in the stream at the middle of the gradient (291.23 mg AFDM m-2). Therefore, shredder richness seems not to respond to the change of vegetation, while variation in biomass suggests that this group may be responding to changes in water temperature, substrate size, and predators presence.
- Tropics
- Invertebrate
- Biodiversity
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Presenters/Authors
Pavel Garcia
(), Organismal Biology, Ecology and Evolution Program, University of Montana, pavel.garciasoto@umontana.edu;
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Robert O. Hall
(), Flathead Lake Biological Station, University of Montana, bob.hall@flbs.umt.edu;
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