Spatiotemporal patterns and drivers of phytoplankton primary productivity in China's lakes and reservoirs at a national scale

Global and Planetary Change, Journal Year: 2023, Volume and Issue: 228, P. 104215 - 104215

Published: Aug. 19, 2023

Language: Английский

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Trophic strategies of freshwater nanoflagellates under variable run‐off scenarios

Limnology and Oceanography, Journal Year: 2025, Volume and Issue: unknown

Published: April 9, 2025

Abstract Terrestrial run‐off is increasing in temperate lakes due to climate change and can lead loading of colored dissolved organic matter (cDOM) nutrients, thus reducing light availability carbon, nitrogen, phosphorus. Run‐off events are highly irregular, resulting temporal resource variability that may determine the energy flow planktonic communities. To understand effects on natural plankton communities, we conducted a mesocosm experiment at SITES AquaNet Lake Erken, Sweden. Treated mesocosms received equal total amount cDOM nutrients but different frequencies magnitudes (Daily, Intermittent, Extreme), while keeping an untreated Control. Here, performed three surrogate prey incubation experiments with fluorescently labeled bacteria study trophic strategies nanoflagellates under scenarios. Our results show phototrophic increased Daily Intermittent additions early stages declined thereafter, likely limitation grazing by rotifers. Heterotrophic nanoflagellate biovolume was highest beginning, rate middle when bacterial abundance highest. The mixotrophic generally low unaffected treatments, despite high densities reduced light, found overall development modulated microzooplankton pressure over time. contributes better understanding influence future global change, including variable terrestrial scenarios, food‐web interactions considering both bottom‐up top‐down processes.

Language: Английский

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Contrasting impacts of warming and browning on periphyton

Limnology and Oceanography Letters, Journal Year: 2023, Volume and Issue: 8(4), P. 628 - 638

Published: Feb. 27, 2023

Abstract We tested interactive effects of warming (+2°C) and browning on periphyton accrual pigment composition when grown a synthetic substrate (plastic strips) in the euphotic zone 16 experimental ponds. found that increased colored dissolved organic matter (cDOM) associated nutrients alone, or combination with warming, resulted substantially enhanced biomass periphyton, comparatively smaller increase phytoplankton. This illustrates is capable using cDOM, by this may affect nutrient availability for However, weakened positive impact accrual, possibly thermal compensation inferred from altered composition, and/or changes community composition. Our results illustrate multiple impacts climate change algal growth, which could have implications productivity consumer resource use, especially shallow areas northern lakes.

Language: Английский

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Stochastic dynamics of phycocyanin in years of contrasting phosphorus load

Ecosphere, Journal Year: 2024, Volume and Issue: 15(6)

Published: June 1, 2024

Abstract Resilience, measured by the distribution of passage times between alternate states, indicates persistence a state in stochastic dynamic systems such as blooms cyanobacteria lakes. We used high‐frequency datasets to compare resilience low and high states phycocyanin, pigment indicator cyanobacteria, Lake Mendota, Wisconsin, USA, for three growing seasons that ranged sevenfold external phosphorus (P) load. Each year we observed 139–265 across unstable threshold separated low‐ from high‐phycocyanin states. sample is highly skewed with median, larger mean, much SD, wide tails extending long lifetimes state. About 25% events, whether or lasted day more. Among these 3 years contrasting P load, there were no discernible differences either ecosystem attribute this lack contrast sustained recycling sediments stochasticity phycocyanin lake.

Language: Английский

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Counteracting effects of “hook avoidance” and “hook habituation” on angler catch rates in a catch‐and‐release fishery

Fisheries Management and Ecology, Journal Year: 2024, Volume and Issue: 31(4)

Published: March 7, 2024

Abstract Catch‐and‐release (C&R) angling is often used to maintain high catch rates but fish vulnerability capture may decrease following hooking, thereby decreasing angler per unit effort (CPUE) (hyperdepletion). To determine if post‐capture response affected recapture probability and population‐level CPUE, individual histories of Largemouth Bass in two lakes were compared before after doubling a Before‐After Control‐Impact (BACI) analysis. Previous day‐of‐season both probability. Counteracting effects previous reduced late‐season caused no hyperdepletion CPUE. Our results highlight the complexity behavioral responses suggest that not be an issue C&R fisheries.

Language: Английский

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Temperature-dependent akinete formation strategies of the harmful cyanobacterium Dolichospermum circinale

Harmful Algae, Journal Year: 2024, Volume and Issue: 139, P. 102722 - 102722

Published: Sept. 7, 2024

Language: Английский

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Whole-lake coarse woody habitat addition facilitates ecosystem regime restructuring in an oligotrophic lake

Lake and Reservoir Management, Journal Year: 2024, Volume and Issue: unknown, P. 1 - 16

Published: Oct. 29, 2024

Preul-Stimetz T, Shaw SL, Sass GG. 2024. Whole-lake coarse woody habitat addition facilitates ecosystem regime restructuring in an oligotrophic lake. Lake Reserv Manag. XXX-XXX.

Language: Английский

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