Anthropocene Coasts最新文献_第10页

Arthropod fauna of the urban coastal wetland of Aguada La Chimba (Antofagasta Region, Chile): a wetland in an arid matrix 智利安托法加斯塔地区Aguada La Chimba城市滨海湿地节肢动物区系:干旱基质中的湿地

Anthropocene Coasts Pub Date : 2022-11-14 DOI: 10.1007/s44218-022-00009-z

J. Pizarro-Araya, F. M. Alfaro, Francisco A. Gómez, Roberto Villablanca

引用次数: 1

Sediment erodibility in the Changjiang (Yangtze) subaqueous delta: spatial–temporal distribution and sedimentary significance 长江水下三角洲沉积物可蚀性:时空分布及其沉积意义

Anthropocene Coasts Pub Date : 2022-11-14 DOI: 10.1007/s44218-022-00011-5

Chaoran Xu, Dongyun Wei, Yining Chen, Yang Yang, Fan Zhang, Y. Wang, J. Jia

引用次数: 0

Sediment erodibility in the Changjiang (Yangtze) subaqueous delta: spatial–temporal distribution and sedimentary significance 长江水下三角洲沉积物可蚀性的时空分布及其沉积意义

Anthropocene Coasts Pub Date : 2022-11-14 DOI: 10.1007/s44218-022-00011-5

Chaoran Xu, Dongyun Wei, Yining Chen, Yang Yang, Fan Zhang, Ya Ping Wang, Jianjun Jia

{"title":"Sediment erodibility in the Changjiang (Yangtze) subaqueous delta: spatial–temporal distribution and sedimentary significance","authors":"Chaoran Xu, Dongyun Wei, Yining Chen, Yang Yang, Fan Zhang, Ya Ping Wang, Jianjun Jia","doi":"10.1007/s44218-022-00011-5","DOIUrl":"10.1007/s44218-022-00011-5","url":null,"abstract":"<div><p>Delta evolution in the context of no sediment discharge has become a global concern, and an accretion-to-erosion conversion is occurring in the Yangtze estuary. This conversion could threaten Changjiang subaqueous delta development. Sediment erodibility is an important indicator of subaqueous delta vulnerability. However, the present and future erodibility of the Changjiang subaqueous delta remains unclear. In this study, 37 short cores were collected from the Changjiang subaqueous delta, and the critical shear stress of the sediment was measured using a cohesive strength meter (CSM) and compared with estimates based on an empirical Shields diagram. The sediment erodibility was analyzed by comparing the sediment critical shear stress with the bed shear stress simulated using a numerical model (i.e., FVCOM), and sediment activity was introduced to discuss the geomorphological change in the subaqueous delta. The CSM-derived critical shear stress is significantly higher than that derived from the empirical Shields formula, but it better shows the erodibility of the sediment. The annual surface sediment activity ranges from 5% to 30% based on the CSM, indicating low surface erodibility. Moreover, the critical shear stress in this region increases as water depth increases, but the bed shear stress shows the opposite trend. Therefore, the erodibility of the Changjiang subaqueous delta is lower than that of the shallow area, indicating no accretion-erosion conversion or continued vertical erosion under sediment starvation in the coming decades. These findings can provide suggestions for erosion assessment and management in large river deltas under decreasing sediment discharge.</p></div>","PeriodicalId":100098,"journal":{"name":"Anthropocene Coasts","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71909263","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Arthropod fauna of the urban coastal wetland of Aguada La Chimba (Antofagasta Region, Chile): a wetland in an arid matrix Aguada La Chimba（智利安托法加斯塔地区）城市沿海湿地的节肢动物群：干旱基质中的湿地

Anthropocene Coasts Pub Date : 2022-11-14 DOI: 10.1007/s44218-022-00009-z

Jaime Pizarro-Araya, Fermín M. Alfaro, Francisco A. Gómez, Roberto Villablanca

{"title":"Arthropod fauna of the urban coastal wetland of Aguada La Chimba (Antofagasta Region, Chile): a wetland in an arid matrix","authors":"Jaime Pizarro-Araya, Fermín M. Alfaro, Francisco A. Gómez, Roberto Villablanca","doi":"10.1007/s44218-022-00009-z","DOIUrl":"10.1007/s44218-022-00009-z","url":null,"abstract":"<div><p>Urban coastal wetlands are fragile ecosystems that provide important ecosystemic services. However, these ecosystems are subject to considerable external pressures from urban development, which leads to serious disturbances in their structure, functioning, and diversity as a result of the advancement of urban, agricultural, foraging, and drainage activities, as well as displacement of endemic species by invasive ones. Within the biological communities of these ecosystems, arthropods play an important trophic and ecological role as food resource, pollinating agents, biological controllers, organic matter decomposers, and nutrient cyclers. In this paper we characterize the taxonomic richness and abundance of the terrestrial arthropod fauna of the Aguada de La Chimba urban coastal wetland (Antofagasta Region, Chile) using various methods. From a total of 1,874 specimens, we identified 109 terrestrial arthropod species, where Insecta was the most represented taxon, with 85 species, 47 families, and 15 orders. The estimated species richness values were higher than the observed values for the different groups under study, and insects showed the highest species values in all estimators. Based on their origin, the communities identified included native (24%), naturalized (22%), and to a lesser extent, endemic species. We also characterize the major threats to this urban wetland and discuss the importance of building public–private partnerships with the local community for the success of biodiversity conservation programs in coastal ecosystems.\u0000</p></div>","PeriodicalId":100098,"journal":{"name":"Anthropocene Coasts","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71909264","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Anthropocene Coasts: 5 years on 人类世海岸：5年前

Anthropocene Coasts Pub Date : 2022-11-10 DOI: 10.1007/s44218-022-00010-6

Shu Gao, Ian Townend

引用次数: 0

Anthropocene Coasts: 5 years on 人类世海岸:5年来

Anthropocene Coasts Pub Date : 2022-11-10 DOI: 10.1007/s44218-022-00010-6

S. Gao, I. Townend

引用次数: 0

Are microplastics the ‘technofossils’ of the Anthropocene? 微塑料是人类世的“技术化石”吗？

Anthropocene Coasts Pub Date : 2022-10-24 DOI: 10.1007/s44218-022-00007-1

Hongyu Chen, Xinqing Zou, Yongcheng Ding, Ying Wang, Guanghe Fu, Feng Yuan

引用次数: 0

Are microplastics the ‘technofossils’ of the Anthropocene? 微塑料是人类世的“技术化石”吗?

Anthropocene Coasts Pub Date : 2022-10-24 DOI: 10.1007/s44218-022-00007-1

Hongyu Chen, Xinqing Zou, Yongcheng Ding, Ying Wang, Guanghe Fu, Feng Yuan

引用次数: 0

Study of an abnormally strong saltwater intrusion in the Humen Channel of the Pearl River estuary 珠江口虎门海峡一次异常强盐水入侵研究

Anthropocene Coasts Pub Date : 2022-10-13 DOI: 10.1007/s44218-022-00008-0

Jiaxi Wang, Bo Hong, Wenping Gong

{"title":"Study of an abnormally strong saltwater intrusion in the Humen Channel of the Pearl River estuary","authors":"Jiaxi Wang, Bo Hong, Wenping Gong","doi":"10.1007/s44218-022-00008-0","DOIUrl":"10.1007/s44218-022-00008-0","url":null,"abstract":"<div><p>Saltwater intrusion in estuaries has become a serious environmental problem, such as in the Pearl River estuary (PRE). In this study, we used a fully validated three-dimensional hydrodynamic model EFDC to numerically investigate the saltwater intrusion in the PRE during the dry season of 2007-2008. Based on the measured salinity, an abnormally strong saltwater intrusion occurred in the Humen Channel in February 2008. The saltwater intrusion occurred twice a month to varying extents, with each saltwater intrusion happening 1-3 days before spring tide, and the stronger saltwater intrusion always occurred at the beginning of the month. Our model results show that caused by a long-term northerly wind during the dry season, the increased steady shear term in the salt transport flux were responsible for the abnormally strong saltwater intrusion in the Humen Channel. The abnormally strong saltwater intrusion has features of long duration, far-reaching upstream distance and great hazard to freshwater resources. The wind effects were revealed to mainly influence the bottom salinity in the middle reach of the PRE, especially near the Humen outlet.</p></div>","PeriodicalId":100098,"journal":{"name":"Anthropocene Coasts","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71909706","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Study of an abnormally strong saltwater intrusion in the Humen Channel of the Pearl River estuary 珠江口虎门航道异常强盐水入侵的研究

Anthropocene Coasts Pub Date : 2022-10-13 DOI: 10.1007/s44218-022-00008-0

Jiaxian Wang, Bo Hong, Wenping Gong

引用次数: 2