Arid
DOI10.1002/rra.1033
Patterns of primary and heterotrophic productivity in an arid lowland river
Gawne, Ben1,2,5; Merrick, Chester2,5; Williams, David G.3,4; Rees, Gavin2,5; Oliver, Rod6; Bowen, P. M.2,5; Treadwell, Simon7; Beattie, Gillian8,9; Ellis, Iain10; Frankenberg, Judy11; Lorenz, Zygmunt6
通讯作者Gawne, Ben
来源期刊RIVER RESEARCH AND APPLICATIONS
ISSN1535-1459
出版年2007
卷号23期号:10页码:1070-1087
英文摘要

Three river conceptual models make differing predictions about the major source of primary production in lowland rivers, acknowledging the importance of primary productivity in the ecology and management of lowland rivers. Patterns of primary production in lowland rivers are still an area of considerable uncertainty. The objective of this study was to examine the major sources and transformations of organic matter in an Australian lowland river and compare them to the predictions of existing models. The broad approach adopted was to quantify the contribution from the major ecosystem components and compare these with estimates of system metabolism determined using open water measures of diel oxygen change. Three 4-km river reaches were selected to represent the extent of variation found along the free-flowing lowland sections of the Murray River, one of Australia’s largest and most regulated rivers. Annual open water gross primary production (GPP) estimates for the Murray R. during this study ranged from 221 to 376 gC m(-2) y(-1) and were similar to other large rivers. Examination of the net contribution of organic matter to the channel indicates that primary productivity in the Murray R. is derived from a combination of phytoplankton, riparian vegetation and macrophytes, but that the major source varies both spatially and temporally. The present study confirms that the River Continuum Concept (RCC), the Flood Pulse Concept (FPC) and Riverine Productivity Model (RPM) all have some application to Australian lowland rivers, but that synthesis of the models will be difficult until we can incorporate the extent, causes and consequences of primary production variability. This study also highlights the importance of the microbial loop and macrophytes in the ecology of the Murray R. Copyright (C) 2007 John Wiley & Sons, Ltd.


英文关键词lowland rivers carbon River Continuum Concept Riverine Productivity Model
类型Article
语种英语
国家Australia
收录类别SCI-E
WOS记录号WOS:000252530100003
WOS关键词ORGANIC-MATTER DYNAMICS ; STREAM ECOSYSTEM THEORY ; FOOD-WEB ; HYDROLOGICAL CONNECTIVITY ; LONGITUDINAL PATTERNS ; FLOODPLAIN SYSTEM ; APPALACHIAN RIVER ; CONTINUUM CONCEPT ; BLACKWATER RIVER ; FLOWING WATERS
WOS类目Environmental Sciences ; Water Resources
WOS研究方向Environmental Sciences & Ecology ; Water Resources
来源机构Commonwealth Scientific and Industrial Research Organisation
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/155919
作者单位1.Murray Darling Freshwater Res Ctr, Wodonga, Vic 3689, Australia;
2.CRC Freshwater Ecol, Wodonga, Vic 3690, Australia;
3.Univ Canberra, CRC Freshwater Ecol, Canberra, ACT 2601, Australia;
4.Univ Canberra, Appl Ecol Res Grp, Canberra, ACT 2601, Australia;
5.Murray Darling Freshwater Res Ctr, Wodonga, Vic 3690, Australia;
6.CSIRO Land & Water, Glen Osmond, SA 5064, Australia;
7.Sinclair Knight Mertz, Armadale, Vic 3143, Australia;
8.Monash Univ, Water Studies Ctr, Clayton, Vic 3800, Australia;
9.Monash Univ, CRC Freshwater Ecol, Clayton, Vic 3800, Australia;
10.Murray Darling Freshwater Res Ctr, Lower Basin Lab, Mildura, Vic 3502, Australia;
11.Warrangee, Howlong, NSW 2643, Australia
推荐引用方式
GB/T 7714
Gawne, Ben,Merrick, Chester,Williams, David G.,et al. Patterns of primary and heterotrophic productivity in an arid lowland river[J]. Commonwealth Scientific and Industrial Research Organisation,2007,23(10):1070-1087.
APA Gawne, Ben.,Merrick, Chester.,Williams, David G..,Rees, Gavin.,Oliver, Rod.,...&Lorenz, Zygmunt.(2007).Patterns of primary and heterotrophic productivity in an arid lowland river.RIVER RESEARCH AND APPLICATIONS,23(10),1070-1087.
MLA Gawne, Ben,et al."Patterns of primary and heterotrophic productivity in an arid lowland river".RIVER RESEARCH AND APPLICATIONS 23.10(2007):1070-1087.
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