Linking permafrost to the abundance, biomass, and energy density of fish in Arctic headwater streams

Ecosphere, Journal Year: 2025, Volume and Issue: 16(5)

Published: May 1, 2025

Abstract Permafrost thaw alters groundwater flow, river hydrology, stream‐catchment interactions, and the availability of carbon nutrients in headwater streams. The impact permafrost on watershed hydrology biogeochemistry streams has been demonstrated, but there is little understanding how influences fish these ecosystems. We examined relations among characteristics, resulting changes water temperature, stream (e.g., discharge flashiness), macroinvertebrates, with abundance, biomass, energy density juvenile Dolly Varden ( Salvelinus malma ) Arctic Grayling Thymallus arcticus across 10 northwestern Alaska. Macroinvertebrate was driven by concentrations dissolved supporting food webs. abundance primarily related to temperature fewer warmer streams, whereas decreased flashiness biomass both bottom‐up web effects. temperatures flashiness. These demonstrate importance terrestrial–aquatic connections landscapes indicate complexity landscape effects fish. Because one most impactful occurring as warms, an improved processes influence populations can aid forecasting future conditions Arctic.

Language: Английский

Integrated physiological, metabolome, and transcriptome analysis of the hepatopancreas in Penaeus vannamei under ammonia stress

Aquaculture International, Journal Year: 2024, Volume and Issue: 32(7), P. 8939 - 8962

Published: July 4, 2024

Language: Английский