干旱区生态环境知识资源中心(Arid): Spatial and Temporal Variation in Macrophyte Litter Decomposition in a Rare Chain-of-ponds, an Intermittent Stream and Wetland System

Arid

DOI	10.1007/s13157-022-01550-w
	Spatial and Temporal Variation in Macrophyte Litter Decomposition in a Rare Chain-of-ponds, an Intermittent Stream and Wetland System
	Hardwick, Lorraine J.; Fryirs, Kirstie A.; Hose, Grant C.
通讯作者	Hardwick, LJ
来源期刊	WETLANDS
ISSN	0277-5212
EISSN	1943-6246
出版年	2022
卷号	42 期号:4
英文摘要	Ponds and wetlands around the world face anthropogenic pressures that threaten key ecosystem processes such as nutrient and organic matter cycling. Wetlands in arid and semi-arid regions are particularly at risk from uncertainty of water availability and competing pressures for use. Such threats are most acute for non-perennial systems that rely on occasional surface water flows to maintain important ecological functions. This study investigates the decomposition of an endemic macrophyte Cycnogeton procerum (R.Br.) Buchenau as a key ecosystem process in a chain-of-ponds wetland system, located in the intermittently flowing Mulwaree River, New South Wales, Australia. The aims of this study were to identify spatial and temporal patterns and the relative importance of microbial activity in macrophyte decomposition to improve our understanding of ecological processes in these intermittent systems. Exponential decomposition rates (proportional mass loss (g)) were highest during spring and summer (0.07-0.10 kd(-1)) and slower during autumn and winter (0.03-0.04 kd(-1)), reflecting seasonal drivers. Decomposition was significantly different in 9 mm and 150 mu m mesh bags only during spring, suggesting decomposition was mostly performed by microbes, with invertebrate herbivores possibly only a factor during spring lotic conditions. Mesotrophic conditions, regulated by flow and internal macrophyte and algal dynamics appear to maintain a highly productive, macrophyte-dominated aquatic wetland system. Temperature was a major factor in decomposition rates and expected increases due to climate change will accentuate pressure on the resilience of the macrophyte community. Alterations caused by changing climate and anthropogenic land use place the ponds at high risk.
英文关键词	Ponds litter decay aquatic plants wetlands primary productivity climate change
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:000779809900001
WOS关键词	FRESH-WATER ; AQUATIC MACROPHYTES ; ECOSYSTEM SERVICES ; EASTERN AUSTRALIA ; FLOW VARIABILITY ; CLIMATE-CHANGE ; REGIME SHIFTS ; LONG-TERM ; FOOD WEBS ; INVERTEBRATES
WOS类目	Ecology ; Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/394910
推荐引用方式 GB/T 7714	Hardwick, Lorraine J.,Fryirs, Kirstie A.,Hose, Grant C.. Spatial and Temporal Variation in Macrophyte Litter Decomposition in a Rare Chain-of-ponds, an Intermittent Stream and Wetland System[J],2022,42(4).
APA	Hardwick, Lorraine J.,Fryirs, Kirstie A.,&Hose, Grant C..(2022).Spatial and Temporal Variation in Macrophyte Litter Decomposition in a Rare Chain-of-ponds, an Intermittent Stream and Wetland System.WETLANDS,42(4).
MLA	Hardwick, Lorraine J.,et al."Spatial and Temporal Variation in Macrophyte Litter Decomposition in a Rare Chain-of-ponds, an Intermittent Stream and Wetland System".WETLANDS 42.4(2022).