Aquatic ecosystems are increasingly threatened by multiple human-induced stressors associated with climate and anthropogenic changes,including warming,nutrient pollution,harmful algal blooms,hypoxia,and changes in CO_...Aquatic ecosystems are increasingly threatened by multiple human-induced stressors associated with climate and anthropogenic changes,including warming,nutrient pollution,harmful algal blooms,hypoxia,and changes in CO_(2) and pH.These stressors may affect systems additively and synergistically but may also counteract each other.The resultant ecosystem changes occur rapidly,affecting both biotic and abiotic components and their interactions.Moreover,the complexity of interactions increases as one ascends the food web due to differing sensitivities and exposures among life stages and associated species interactions,such as competition and predation.There is also a need to further understand nontraditional food web interactions,such as mixotrophy,which is the ability to combine photosynthesis and feeding by a single organism.The complexity of these interactions and nontraditional food webs presents challenges to ecosystem modeling and management.Developing ecological models to understand multistressor effects is further challenged by the lack of sufficient data on the effects of interactive stressors across different trophic levels and the substantial variability in climate changes on regional scales.To obtain data on a broad suite of interactions,a nested set of experiments can be employed.Modular,coupled,multitrophic level models will provide the flexibility to explore the additive,amplified,propagated,antagonistic,and/or reduced effects that can emerge from the interactions of multiple stressors.Here,the stressors associated with eutrophication and climate change are reviewed,and then example systems from around the world are used to illustrate their complexity and how model scenarios can be used to examine potential future changes.展开更多
Atmospheric emission and deposition of mercury(Hg),a toxic metal of global concern,has been long considered to control environmental Hg levels in water,soil,sediment,and ultimately fish,which is the major exposure sou...Atmospheric emission and deposition of mercury(Hg),a toxic metal of global concern,has been long considered to control environmental Hg levels in water,soil,sediment,and ultimately fish,which is the major exposure source for humans.In the last two decades,a number of studies of varying spatiotemporal scales and approaches have shown that fish Hg,particularly in lakes and open oceans,is positively and linearly correlated with atmospheric Hg deposition through both dry and/or wet deposition[1-3].展开更多
Anthropogenic CO_(2)emissions have greatly increased atmospheric CO_(2)contributing to global warming and leading to ocean acidification(Figure 1).As reflected in the recent IPCC report,the scientific community’s con...Anthropogenic CO_(2)emissions have greatly increased atmospheric CO_(2)contributing to global warming and leading to ocean acidification(Figure 1).As reflected in the recent IPCC report,the scientific community’s consensus is that emissions reductions alone are not sufficient or timely enough to avoid a global warming catastrophe.展开更多
基金supported in part by the NOAA Awards NA17NOS478180(to ML and PMG),NA19NOS4780183(to PMG and ML),NA15NOS4780184 and NA18NOS4780179(to JMT,WJC and ML),and NA16NOS4780204(to KAR)philanthropy support(to ERH)and by the NSF Award DEB 1911349(to PMG).
文摘Aquatic ecosystems are increasingly threatened by multiple human-induced stressors associated with climate and anthropogenic changes,including warming,nutrient pollution,harmful algal blooms,hypoxia,and changes in CO_(2) and pH.These stressors may affect systems additively and synergistically but may also counteract each other.The resultant ecosystem changes occur rapidly,affecting both biotic and abiotic components and their interactions.Moreover,the complexity of interactions increases as one ascends the food web due to differing sensitivities and exposures among life stages and associated species interactions,such as competition and predation.There is also a need to further understand nontraditional food web interactions,such as mixotrophy,which is the ability to combine photosynthesis and feeding by a single organism.The complexity of these interactions and nontraditional food webs presents challenges to ecosystem modeling and management.Developing ecological models to understand multistressor effects is further challenged by the lack of sufficient data on the effects of interactive stressors across different trophic levels and the substantial variability in climate changes on regional scales.To obtain data on a broad suite of interactions,a nested set of experiments can be employed.Modular,coupled,multitrophic level models will provide the flexibility to explore the additive,amplified,propagated,antagonistic,and/or reduced effects that can emerge from the interactions of multiple stressors.Here,the stressors associated with eutrophication and climate change are reviewed,and then example systems from around the world are used to illustrate their complexity and how model scenarios can be used to examine potential future changes.
文摘Atmospheric emission and deposition of mercury(Hg),a toxic metal of global concern,has been long considered to control environmental Hg levels in water,soil,sediment,and ultimately fish,which is the major exposure source for humans.In the last two decades,a number of studies of varying spatiotemporal scales and approaches have shown that fish Hg,particularly in lakes and open oceans,is positively and linearly correlated with atmospheric Hg deposition through both dry and/or wet deposition[1-3].
基金supported by the National Natural Science Foundation of China(42188102,42176036,and 51120195001)the Science and Technology Program of Zhoushan City(2022C81002)the Fundamental Research Funds for the Central Universities,and the Ocean Negative Carbon Emission(ONCE)Program。
基金possible by National Science Foundation of China grant no.42188102the National Science Foundation EPSCoR grant no.1757353the state of Delaware,and the ONCE program partnered with UNESCO-IOC,PICE,and ICES.
文摘Anthropogenic CO_(2)emissions have greatly increased atmospheric CO_(2)contributing to global warming and leading to ocean acidification(Figure 1).As reflected in the recent IPCC report,the scientific community’s consensus is that emissions reductions alone are not sufficient or timely enough to avoid a global warming catastrophe.
