Warming alters food web-driven changes in the CO2 flux of experimental pond ecosystems

被引：11

作者：

Atwood, T. B. ^{[1
,2
,3
]}

Hammill, E. ^{[2
,3
]}

Kratina, P. ^{[4
]}

Greig, H. S. ^{[5
]}

Shurin, J. B. ^{[6
]}

Richardson, J. S. ^{[1
]}

机构：

[1] Univ British Columbia, Dept Forest & Conservat Sci, Vancouver, BC V6T IZ4, Canada

[2] Utah State Univ, Dept Watershed Sci, Logan, UT 84322 USA

[3] Utah State Univ, Ctr Ecol, Logan, UT 84322 USA

[4] Queen Mary Univ London, Sch Biol & Chem Sci, London E1 4NS, England

[5] Univ Maine, Sch Biol & Ecol, Orono, ME 04469 USA

[6] Univ Calif San Diego, Sect Ecol Behav & Evolut, La Jolla, CA 92093 USA

来源：

BIOLOGY LETTERS | 2015年 / 11卷 / 12期

基金：

加拿大自然科学与工程研究理事会;

关键词：

trophic cascades; biosequestration; carbon cycling; climate change; TROPHIC CASCADES; LAKES; EXCHANGE;

D O I：

10.1098/rsbl.2015.0785

中图分类号：

Q [生物科学];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Evidence shows the important role biota play in the carbon cycle, and strategic management of plant and animal populations could enhance CO2 uptake in aquatic ecosystems. However, it is currently unknown how management-driven changes to community structure may interact with climate warming and other anthropogenic perturbations to alter CO2 fluxes. Here we showed that under ambient water temperatures, predators (three-spined stickleback) and nutrient enrichment synergistically increased primary producer biomass, resulting in increased CO2 uptake by mesocosms in early dawn. However, a 3 degrees C increase in water temperatures counteracted positive effects of predators and nutrients, leading to reduced primary producer biomass and a switch from CO2 influx to efflux. This confounding effect of temperature demonstrates that climate scenarios must be accounted for when undertaking ecosystem management actions to increase biosequestration.

引用

页数：4

共 18 条

[1] Trophic-level dependent effects on CO2 emissions from experimental stream ecosystems [J].