DOI: 10.1111/ddi.12998
论文题名: Spatial patterns and temporal variability of seagrass connectivity in the Mediterranean Sea
作者: Mari L. ; Melià P. ; Fraschetti S. ; Gatto M. ; Casagrandi R.
刊名: Diversity and Distributions
ISSN: 13669516
出版年: 2020
卷: 26, 期: 2 语种: 英语
英文关键词: biophysical modelling
; conservation hotspots
; dispersal
; Lagrangian simulations
; marine connectivity
Scopus关键词: biophysics
; boundary condition
; connectivity
; conservation planning
; ecosystem service
; human activity
; Lagrangian analysis
; marine environment
; prioritization
; seagrass
; temporal variation
; time series analysis
; Mediterranean Sea
; Posidonia oceanica
英文摘要: Aim: The endemic seagrass Posidonia oceanica is a key component of the coastal seascapes of the Mediterranean Sea, where it provides crucial ecosystem services and promotes the assembly of diverse ecological communities. Although protection policies exist, P. oceanica meadows have been steadily declining in the recent past because of human activities and climate change. Here, we quantitatively analyse basin-wide patterns of seagrass connectivity over a 30-year-long period and identify connectivity hotspots that may serve as priority targets for conservation actions. Location: Mediterranean Sea. Time period: 1987–2016. Major taxa studied: The seagrass P. oceanica. Methods: A biophysical Lagrangian approach is used to simulate dispersal of seagrass fruits operated by marine currents. Connectivity metrics (self-retention, indegree and outdegree) are evaluated on top of Lagrangian simulations to identify the most ecologically connected areas. Time series of local connectivity scores are analysed to study temporal variability and possibly detect trends at different spatial scales. Results: Spatio-temporal variability is an important component of seagrass connectivity in the Mediterranean. Connectivity hotspots are unevenly distributed in all of its four main sub-basins, and along both European and African coastlines. Although statistically significant local trends in connectivity are generally quite infrequent across the whole basin, they appear to be relatively more prevalent in connectivity hotspots. The interannual variability of average connectivity scores seems to be at least partially linked to meteorological fluctuations. Main conclusions: The present study represents a step forward in the application of a quantitative, scalable and replicable methodological framework for the prioritization of seagrass conservation actions in the Mediterranean large marine ecosystem, a challenging environment characterized by complex socio-economic boundary conditions and high sensitivity to the localized effects of global climate change. © 2019 The Authors. Diversity and Distributions published by John Wiley & Sons Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/159850
Appears in Collections: 气候变化与战略
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作者单位: Dipartimento di Elettronica, Informazione e Bioingegneria, Politecnico di Milano, Milano, Italy; Dipartimento di Scienze e Tecnologie Biologiche ed Ambientali, Università del Salento, Lecce, Italy
Recommended Citation:
Mari L.,Melià P.,Fraschetti S.,et al. Spatial patterns and temporal variability of seagrass connectivity in the Mediterranean Sea[J]. Diversity and Distributions,2020-01-01,26(2)