GSTDTAP  > 地球科学
DOI10.1073/pnas.1719963115
Allometric scaling of estuarine ecosystem metabolism
Nidzieko, Nicholas J.
2018-06-26
发表期刊PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
ISSN0027-8424
出版年2018
卷号115期号:26页码:6733-6738
文章类型Article
语种英语
国家USA
英文摘要

There are still significant uncertainties in the magnitude and direction of carbon fluxes through coastal ecosystems. An important component of these biogeochemical budgets is ecosystem metabolism, the net result of organismal metabolic processes within an ecosystem. In this paper, I present a synthesis of published ecosystem metabolism studies from coastal ecosystems and describe an empirical observation that size-dependent patterns in aquatic gross primary production and community respiration exist across a wide range of coastal geomorphologies. Ecosystem metabolism scales to the 3/4 power with volume in deeper estuaries dominated by pelagic primary production and nearly linearly with area in shallow estuaries dominated by benthic primary production. These results can be explained by applying scaling arguments for efficient, directed transport networks developed to explain similar size-dependent patterns in organismal metabolism. The main conclusion from this synthesis is that the residence time of new, nutrient-rich water is a fundamental organizing principle for the observed patterns. Residence time changes allometrically with size in pelagic ecosystems because velocities change by only an order of magnitude across systems that span more than ten orders of magnitude in size. This nonisometric change in velocity with size requires lower specific metabolic rates at larger ecosystem sizes. This change in transport may also explain a shift from predominantly net heterotrophy to net autotrophy with increasing size. The scaling results are applied to the total estuarine area in the continental United States to estimate the contribution of estuarine systems to the overall coastal budget of organic carbon.


英文关键词ecosystem metabolism estuaries primary production allometric scaling metabolic theory
领域地球科学 ; 气候变化 ; 资源环境
收录类别SCI-E
WOS记录号WOS:000436245000074
WOS关键词ORGANIC-CARBON BALANCE ; COASTAL OCEAN ; PHYTOPLANKTON COMMUNITIES ; AQUATIC ECOSYSTEMS ; SIZE-STRUCTURE ; VARIABILITY ; ECOLOGY ; PREDICTION ; DIVERSITY ; ABUNDANCE
WOS类目Multidisciplinary Sciences
WOS研究方向Science & Technology - Other Topics
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文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/204941
专题地球科学
资源环境科学
气候变化
作者单位Univ Calif Santa Barbara, Dept Geog, Santa Barbara, CA 93106 USA
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Nidzieko, Nicholas J.. Allometric scaling of estuarine ecosystem metabolism[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2018,115(26):6733-6738.
APA Nidzieko, Nicholas J..(2018).Allometric scaling of estuarine ecosystem metabolism.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,115(26),6733-6738.
MLA Nidzieko, Nicholas J.."Allometric scaling of estuarine ecosystem metabolism".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 115.26(2018):6733-6738.
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