Mesozooplankton size structure in response to environmental conditions in the East China Sea: How much does size spectra theory fit empirical data of a dynamic coastal area?

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	Mesozooplankton size structure in response to environmental conditions in the East China Sea: How much does size spectra theory fit empirical data of a dynamic coastal area?
	Garcia-Comas, Carmen 1; Chang, Chun-Yi 1; Ye, Lin 1,2; Sastri, Akash R.3; Lee, Yu-Ching 1; Gong, Gwo-Ching 4,5; Hsieh, Chih-hao 1,6
刊名	PROGRESS IN OCEANOGRAPHY
	2014-02-01
卷号	121 期号:-页码:141-157
关键词	OPTICAL PLANKTON COUNTER FOOD-WEB STRUCTURE GROWTH-RATE HYPOTHESIS BODY-SIZE CHLOROPHYLL-A CHEMICAL HYDROGRAPHY ZOOPLANKTON SAMPLES COMMUNITY STRUCTURE AQUATIC ECOSYSTEMS PELAGIC ECOSYSTEM
ISSN号	0079-6611
通讯作者	Garcia-Comas, C (reprint author), Japan Agcy Marine Sci & Technol, Environm Biogeochem Cycle Res Program, Res Inst Global Change, Kanazawa Ku, 3173-25 Showa Machi, Yokohama, Kanagawa 2360001, Japan.
中文摘要	A fundamental ecological trait of marine organisms is body size. Various theoretical models have used the size distribution of plankton communities to explain their trophic structure and functioning. Recent studies indicate that changes associated with global warming, eutrophication, and fisheries might have dramatically shifted the size structure of marine organisms and thus changed ecosystem functioning. Accordingly, size structure has been suggested as a useful indicator for monitoring ecosystem status. Here, we used three size metrics to represent mesozooplankton size structure: the slope of normalized biomass spectra (NB-SS), NB-SS linear fit, and size diversity. We analyzed the relationship between zooplankton size structure and environmental conditions in the very dynamic East China Sea (ECS). We tested four hypotheses predicted by theoretical studies: (1) a coastal-offshore gradient for NB-SS, (2) a negative relationship between temperature and NB-SS steepness, (3) a positive relationship between trophic status (i.e., chlorophyll a and inorganic-nutrient concentrations as a proxy) and NB-SS steepness, and (4) a positive relationship between oligotrophy and NB-SS linearity. Hypotheses 1-3 did not stand up to our analyses of the empirical data, while hypothesis 4 was supported. In the ECS, we found no clear spatial gradient for each of the three size metrics, where (i) size diversity was not correlated to temperature and significantly decreased with chl a and phosphate concentrations, (ii) the NB-SS slope showed no relationship with the environment, and (iii) NB-SS linearity tended to be higher in more oligotrophic offshore waters. Trophic status exerted a stronger effect than temperature on size distribution, but its effect was opposite to model prediction. Our results suggest that population dynamics (i.e., pulses of reproduction due to increased food availability) override metabolic scaling effects on mesozooplankton NB-SS at the mesoscale. In addition, the estimation of NB-SS slopes depends on NB-SS linearity and may therefore be less accurate than size diversity as a synthetic indicator of NB-SS changes. Our results highlight the need for caution when using size-based indicators for monitoring environmental forcing on communities in highly dynamic ecosystems. (C) 2013 Elsevier Ltd. All rights reserved.
英文摘要	A fundamental ecological trait of marine organisms is body size. Various theoretical models have used the size distribution of plankton communities to explain their trophic structure and functioning. Recent studies indicate that changes associated with global warming, eutrophication, and fisheries might have dramatically shifted the size structure of marine organisms and thus changed ecosystem functioning. Accordingly, size structure has been suggested as a useful indicator for monitoring ecosystem status. Here, we used three size metrics to represent mesozooplankton size structure: the slope of normalized biomass spectra (NB-SS), NB-SS linear fit, and size diversity. We analyzed the relationship between zooplankton size structure and environmental conditions in the very dynamic East China Sea (ECS). We tested four hypotheses predicted by theoretical studies: (1) a coastal-offshore gradient for NB-SS, (2) a negative relationship between temperature and NB-SS steepness, (3) a positive relationship between trophic status (i.e., chlorophyll a and inorganic-nutrient concentrations as a proxy) and NB-SS steepness, and (4) a positive relationship between oligotrophy and NB-SS linearity. Hypotheses 1-3 did not stand up to our analyses of the empirical data, while hypothesis 4 was supported. In the ECS, we found no clear spatial gradient for each of the three size metrics, where (i) size diversity was not correlated to temperature and significantly decreased with chl a and phosphate concentrations, (ii) the NB-SS slope showed no relationship with the environment, and (iii) NB-SS linearity tended to be higher in more oligotrophic offshore waters. Trophic status exerted a stronger effect than temperature on size distribution, but its effect was opposite to model prediction. Our results suggest that population dynamics (i.e., pulses of reproduction due to increased food availability) override metabolic scaling effects on mesozooplankton NB-SS at the mesoscale. In addition, the estimation of NB-SS slopes depends on NB-SS linearity and may therefore be less accurate than size diversity as a synthetic indicator of NB-SS changes. Our results highlight the need for caution when using size-based indicators for monitoring environmental forcing on communities in highly dynamic ecosystems. (C) 2013 Elsevier Ltd. All rights reserved.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Oceanography
研究领域[WOS]	Oceanography
关键词[WOS]	OPTICAL PLANKTON COUNTER ; FOOD-WEB STRUCTURE ; GROWTH-RATE HYPOTHESIS ; BODY-SIZE ; CHLOROPHYLL-A ; CHEMICAL HYDROGRAPHY ; ZOOPLANKTON SAMPLES ; COMMUNITY STRUCTURE ; AQUATIC ECOSYSTEMS ; PELAGIC ECOSYSTEM
收录类别	SCI
语种	英语
WOS记录号	WOS:000332432000012
公开日期	2014-08-07
内容类型	期刊论文
源URL	[http://ir.ihb.ac.cn/handle/342005/20022]
专题	水生生物研究所_淡水生态学研究中心_期刊论文
作者单位	1.Natl Taiwan Univ, Inst Oceanog, Taipei 10617, Taiwan 2.Chinese Acad Sci, State Key Lab Freshwater Ecol & Biotechnol, Inst Hydrobiol, Wuhan 430072, Peoples R China 3.Univ Quebec, Dept Biol Sci, Montreal, PQ H3C 3P8, Canada 4.Natl Taiwan Ocean Univ, Inst Marine Environm Chem & Ecol, Keelung 20224, Taiwan 5.Natl Taiwan Ocean Univ, Ctr Excellence Marine Bioenvironm & Biotechnol, Keelung 20224, Taiwan 6.Natl Taiwan Univ, Inst Ecol & Evolutionary Biol, Taipei 10617, Taiwan
推荐引用方式 GB/T 7714	Garcia-Comas, Carmen,Chang, Chun-Yi,Ye, Lin,et al. Mesozooplankton size structure in response to environmental conditions in the East China Sea: How much does size spectra theory fit empirical data of a dynamic coastal area?[J]. PROGRESS IN OCEANOGRAPHY,2014,121(-):141-157.
APA	Garcia-Comas, Carmen.,Chang, Chun-Yi.,Ye, Lin.,Sastri, Akash R..,Lee, Yu-Ching.,...&Hsieh, Chih-hao.(2014).Mesozooplankton size structure in response to environmental conditions in the East China Sea: How much does size spectra theory fit empirical data of a dynamic coastal area?.PROGRESS IN OCEANOGRAPHY,121(-),141-157.
MLA	Garcia-Comas, Carmen,et al."Mesozooplankton size structure in response to environmental conditions in the East China Sea: How much does size spectra theory fit empirical data of a dynamic coastal area?".PROGRESS IN OCEANOGRAPHY 121.-(2014):141-157.