Human activities accelerated the degradation of saline seepweed red beaches by amplifying top-down and bottom-up forces

doi:10.1002/ecs2.2352

	Human activities accelerated the degradation of saline seepweed red beaches by amplifying top-down and bottom-up forces
	Lu, Weizhi 1,2; Xiao, Jingfeng 1; Lei, Wei 2; Du, Jinqiu 2; Li, Zhengjie 3; Cong, Pifu 2; Hou, Wenhao 2; Zhang, Jialin 2; Chen, Luzhen 4; Zhang, Yihui 4
刊名	ECOSPHERE
	2018-07-01
卷号	9 期号:7
关键词	Blue Carbon Bottom-up Forces Coastal Wetlands Crab Grazing Degradation Landsat Plant-herbivore Red Beaches Salt Marshes Sediment Elevation Change Succession Top-down Forces
ISSN号	2150-8925
DOI	10.1002/ecs2.2352
英文摘要	Salt marshes dominated by saline seepweed (Suaeda heteroptera) provide important ecosystem services such as sequestering carbon (blue carbon), maintaining healthy fisheries, and protecting shorelines. These salt marshes also constitute stunning red beach landscapes, and the resulting tourism significantly contributes to the local economy. However, land use change and degradation have led to a substantial loss of the red beach area. It remains unclear how human activities influence the top-down and bottom-up forces that regulate the distribution and succession of these salt marshes and lead to the degradation of the red beaches. We examined how bottom-up forces influenced the germination, emergence, and colonization of saline seepweed with field measurements and a laboratory experiment. We also examined whether top-down forces affected the red beach distribution by conducting a field survey for crab burrows and density, laboratory feeding trials, and waterbird investigations. The higher sediment accretion rate induced by human activities limited the establishment of new red beaches. The construction of tourism facilities and the frequent presence of tourists reduced the density of waterbirds, which in turn increased the density of crabs, intensifying the top-down forces such as predators and herbivores that drive the degradation of the coastal red beaches. Our results show that sediment accretion and plant-herbivory changes induced by human activities were likely the two primary ecological processes leading to the degradation of the red beaches. Human activities significantly shaped the abundance and distribution of the red beaches by altering both top-down and bottom-up ecological processes. Our findings can help us better understand the dynamics of salt marshes and have implications for the management and restoration of coastal wetlands.
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	WILEY
WOS记录号	WOS:000441526900024
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/121223]
专题	中国科学院沈阳应用生态研究所
通讯作者	Xiao, Jingfeng
作者单位	1.Univ New Hampshire, Inst Study Earth Oceans & Space, Earth Syst Res Ctr, Durham, NH 03824 USA 2.Natl Marine Environm Monitoring Ctr, Key Lab Ecol Environm Coastal Areas SOA, Dalian 116023, Peoples R China 3.Chinese Acad Sci, Inst Appl Ecol, CAS Key Lab Forest Ecol & Management, Shenyang 110164, Liaoning, Peoples R China 4.Xiamen Univ, Coll Environm & Ecol, Key Lab, Minist Educ Coastal & Wetland Ecosyst, Xiamen 361102, Fujian, Peoples R China
推荐引用方式 GB/T 7714	Lu, Weizhi,Xiao, Jingfeng,Lei, Wei,et al. Human activities accelerated the degradation of saline seepweed red beaches by amplifying top-down and bottom-up forces[J]. ECOSPHERE,2018,9(7).
APA	Lu, Weizhi.,Xiao, Jingfeng.,Lei, Wei.,Du, Jinqiu.,Li, Zhengjie.,...&Liao, Guoxiang.(2018).Human activities accelerated the degradation of saline seepweed red beaches by amplifying top-down and bottom-up forces.ECOSPHERE,9(7).
MLA	Lu, Weizhi,et al."Human activities accelerated the degradation of saline seepweed red beaches by amplifying top-down and bottom-up forces".ECOSPHERE 9.7(2018).