当前位置: X-MOL 学术Aquat. Conserv. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
From individual vital rates to population dynamics: An integral projection model for European native oysters in a marine protected area
Aquatic Conservation: Marine and Freshwater Ecosystems ( IF 2.4 ) Pub Date : 2020-11-12 , DOI: 10.1002/aqc.3445
Alice E. Lown 1 , Leanne J. Hepburn 1 , Rob Dyer 2 , Tom C. Cameron 1
Affiliation  

  1. Following an 85% decline in global oyster populations, there has been a recent resurgence in interest in the restoration of the European native oyster Ostrea edulis. Motivations for restoration from environmental stakeholders most often include recovering lost habitats and associated biodiversity and supporting ecosystem function. In coastal communities, another important justification is recovery of traditional and low‐impact fisheries but this has received less attention.
  2. Many restoration projects across Europe focus on the translocation of adult stocks, under the assumption that the limit to population growth and recovery is adult growth and survival. This may not necessarily be the case, especially where knowledge of large extant adult populations exists as in the Blackwater, Crouch, Roach and Colne Marine Conservation Zone in Essex, UK. Identifying what limits population growth for restoration and recovery is an important conservation tool.
  3. Here, the first size‐dependent survival, growth and fecundity data for free‐living O. edulis from a novel field experiment are used to parameterize an Integral Projection Model that examines the sensitivity of a flat oyster population to variation in individual vital rates and to potential harvesting – an original objective of a coastal community‐led restoration project.
  4. Given the high adult fecundity in this species, population recovery is most sensitive to changes in recruitment success; however, elasticity (proportional sensitivity of the population) is more evenly spread across other parameters when recruitment is already high. Based on locally agreed management objectives, recovery to double the current stock biomass should take 16–66 years (mean = 30 years) without active intervention. At that point, harvest rates could be sustained below 5% of the harvestable adult size whilst ensuring λs remains above 1.


中文翻译:

从个体生命率到种群动态:海洋保护区内欧洲本地牡蛎的完整投影模型

  1. 继全球牡蛎种群的85%的降幅,出现了在欧洲本土牡蛎的恢复兴趣最近死灰复燃食用牡蛎。来自环境利益相关者恢复的动机通常包括恢复失去的栖息地和相关的生物多样性并支持生态系统功能。在沿海社区,另一个重要的理由是恢复传统和低影响的渔业,但这受到的关注较少。
  2. 欧洲的许多恢复项目都以成年种群的转移为重点,并假设人口增长和恢复的局限性是成年增长和生存。情况未必一定如此,尤其是在英国现存的黑水,克劳奇,罗奇和科恩海洋保护区中,存在着大量现成的成年人的情况下。确定什么限制人口增长以恢复和恢复是重要的保护工具。
  3. 在这里,使用来自新野外试验的自由活动食草的第一个依赖大小的生存,生长和繁殖力数据,对整体投影模型进行参数化,该模型检查了牡蛎种群对个体生命率变化和潜在的收获–沿海社区主导的修复项目的最初目标。
  4. 鉴于该物种的成年繁殖力高,种群恢复对招聘成功的变化最为敏感。但是,在招募人数已经很高的情况下,弹性(人口的比例敏感性)会在其他参数上更均匀地分布。根据当地商定的管理目标,在没有积极干预的情况下,要使现有生物量翻一番的恢复需要16-66年(平均= 30年​​)。在这一点上,收获率可能低于成人收获大小的5%持续,同时确保λ小号超过1遗体。
更新日期:2020-11-12
down
wechat
bug