期刊
WATER
卷 11, 期 3, 页码 -出版社
MDPI
DOI: 10.3390/w11030524
关键词
crucian carp; C/N/P stoichiometry; suspended particulate matter; eutrophication; shallow lakes
资金
- Chinese National Key Research and Development Project [2017YFA0605201]
- National Science Foundation of China [31770509, 41877415, 41571086]
- NIGLAS 135 Project [NIGLAS2017GH01, NIGLAS2018GH04]
- National Water Pollution Control and Management Technology Major Projects of China [2017ZX07203-005]
- Science and Technology Service Network Initiative [KFJ-STS-ZDTP-038-3]
- AQUACOSM (Network of Leading European AQUAtic MesoCOSM Facilities Connecting Mountains to Oceans from the Arctic to the Mediterranean)
- AnaEE Denmark
- Centre for Water Technology at Aarhus University
Crucian carp (Carassius carassius) is a key fish species in most Chinese subtropical and tropical shallow lakes. Through sediment feeding, crucian carp could greatly change water turbidity and nutrient levels, as well as the abundance of herbivorous consumers, which may have important influences on seston element stoichiometry. However, so far, experimental studies on this topic are lacking. We conducted a 36-day mesocosm experiment to explore the effects of crucian carp on water physicochemical and biological properties, and C/N/P ratios in suspended particulate matter (SPM) under eutrophic conditions. Our results provided three major findings: (1) Crucian carp resuspended sediments and along with them, reduced light penetration and lower light/total phosphorus (TP) ratios. (2) Crucian carp reduced biomasses of both zooplankton and macrozoobenthos, whereas their effect on phytoplankton was weak, potentially because of resuspension-induced light limitation. (3) Both C/P and N/P ratios in SPM were significant lower in mesocosms with crucian carp than in fish-free controls, which may be attributed to the high contribution of P-rich sediments and low light to nutrient supply caused by fish-induced resuspension. Our results suggest that besides planktivorous fish, benthivore (e.g., crucian carp) in warm shallow waters could also affect pelagic C/N/P stoichiometry via sediment feeding, which may further influence energy transfer efficiency in lake food chain.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据