RAPID: Testing the rocky intertidal community consequences of the decimation of purple sea star populations along the Oregon coast by sea star wasting disease

RAPID:测试海星消耗性疾病导致俄勒冈州海岸紫海星种群大量减少对潮间带岩石群落的影响

基本信息

  • 批准号:
    1448913
  • 负责人:
  • 金额:
    $ 7.5万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    2014
  • 资助国家:
    美国
  • 起止时间:
    2014-07-01 至 2016-06-30
  • 项目状态:
    已结题

项目摘要

This study will investigate the ecological consequences of the decimation of sea star populations by wasting disease along the Oregon coast. Hallmarks of wasting disease are the formation of sores on the sea star that progress to cause loss of arms, and ultimately death of the animal. Wasting disease was reported in sea star populations including those of the purple sea star, Pisaster ochraceus, in British Columbia, Washington, and California as early as April 2013. In Oregon, wasting was first observed in April 2014, and by June 2014 rates of infection ranged up to 80%, and sea star abundance had declined. At that rate, many populations may disappear by the end of summer 2014. Prior research has shown that in the absence of the purple sea star, mid-shore mussel populations increase, and ultimately overgrow the sea weeds and invertebrates that occur low on the shore, reducing biodiversity. However, because disease events of this magnitude have never occurred along the entire coastline, it is unclear if the small-scale expansion of mussels observed previously will be a general result of this event. One possibility is that predators unaffected by wasting, such as whelks and crabs, will increase their predation effects and blunt the expected invasion of mussels to the low shore. The research in this project will evaluate this possibility by testing the role of these alternative predators. Broader Impacts include the training of undergraduate and graduate students, the involvement of coastal residents and the production of microdocumentaries and video to document the changing context of this ecosystem.The research project is designed to test three hypotheses. First, that in the absence of Pisaster ochraceus, predation by whelks will increase in strength through increases in whelk abundance and in whelk size, and at least partially compensate for the absence of Pisaster. Second, the small sea star Leptasterias spp. will also expand its role as a predator through increased size and abundance, and expansion of its habitat beyond mussel beds. Although individuals of this sea star have been observed to suffer from wasting as well, the frequency so far appears low, and it seems likely this species may persist. Third, the crab Cancer productus, normally mostly a subtidal species, will expand its range into the intertidal and help to compensate for the loss of Pisaster. Tests of these hypotheses will include manual removal experiments (whelk removal, Leptasterias removal, removal of both and of neither), cage exclusion experiments (whelk exclusions), cage inclusion-exclusion experiments (Leptasterias inclusion, Leptasterias exclusion). Experiments will be replicated with appropriate controls, and done at multiple sites on the central Oregon coast that vary naturally in population abundances, rates of prey and predator recruitment, and oceanographic conditions. Results obtained under this unprecedented set of circumstances will deepen and expand our empirical understanding of the dynamics of an iconic ecosystem, and will help parameterize community models.
这项研究将调查俄勒冈州海岸海星种群因浪费疾病而大量死亡的生态后果。消耗性疾病的特征是海星上形成的溃疡,进展到导致失去手臂,最终导致动物死亡。早在2013年4月,不列颠哥伦比亚省、华盛顿州和加利福尼亚州的海星种群中就有报道称,包括紫色海星在内的海星种群患有消耗性疾病。在俄勒冈州,2014年4月首次观察到海星的消瘦,到2014年6月,感染率高达80%,海星数量下降。按照这种速度,到2014年夏末,许多种群可能会消失。先前的研究表明,在没有紫色海星的情况下,中岸贻贝的数量会增加,最终会使岸上低地出现的海草和无脊椎动物过度生长,从而减少生物多样性。然而,由于整个海岸线从未发生过如此大规模的疾病事件,尚不清楚之前观察到的贻贝小规模扩张是否会是这一事件的总体结果。一种可能性是,不受消耗影响的捕食者,如海螺和螃蟹,将增加它们的捕食效果,削弱贻贝对低海岸的预期入侵。该项目的研究将通过测试这些替代捕食者的作用来评估这种可能性。更广泛的影响包括对本科生和研究生的培训,沿海居民的参与,以及制作微型纪录片和视频以记录这一生态系统不断变化的背景。研究项目旨在检验三个假设。首先,在没有黄鱼的情况下,海螺的捕食将通过增加海螺的数量和大小来增加强度,并至少部分补偿没有海豚的情况。其次,小海星Leptasterias spp.还将通过增加其大小和丰度,以及将其栖息地扩大到贻贝之外,扩大其作为捕食者的角色。虽然已经观察到这种海星的个体也遭受着消瘦的痛苦,但到目前为止,这种频率似乎很低,似乎这种物种可能会持续下去。第三,蟹类通常是潮下物种,它将把活动范围扩大到潮间带,并帮助补偿Pisaster的损失。对这些假设的检验将包括手动去除实验(去除青春痘、去除细毛藻、去除两者和两者都不去除)、笼式排除实验(排除青春痘)、笼式包裹体-排除实验(包含细毛虫、排除细毛藻)。实验将在适当的控制下重复进行,并在俄勒冈州中部海岸的多个地点进行,这些地点在种群数量、猎物和捕食者招募速度以及海洋条件方面存在自然差异。在这种史无前例的情况下获得的结果将深化和扩大我们对标志性生态系统动态的经验理解,并将有助于将社区模型参数化。

项目成果

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Bruce Menge其他文献

Bruce Menge的其他文献

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{{ truncateString('Bruce Menge', 18)}}的其他基金

RAPID: A subtle epidemic: unique mortality of Mytilus californianus on the Oregon coast
快速:一种微妙的流行病:俄勒冈州海岸贻贝的独特死亡率
  • 批准号:
    2346837
  • 财政年份:
    2023
  • 资助金额:
    $ 7.5万
  • 项目类别:
    Standard Grant
LTREB: Testing tipping points in a model rocky intertidal meta-ecosystem – Climate-change, increasing variances, and response mechanisms
LTREB:测试岩石潮间带元生态系统模型中的临界点 — 气候变化、增加的方差和响应机制
  • 批准号:
    2050017
  • 财政年份:
    2021
  • 资助金额:
    $ 7.5万
  • 项目类别:
    Continuing Grant
Collaborative Research: Mechanisms of resistance and resilience to system-wide loss of a keystone predator in an iconic intertidal community
合作研究:标志性潮间带群落中关键捕食者全系统丧失的抵抗力和恢复力机制
  • 批准号:
    1735911
  • 财政年份:
    2017
  • 资助金额:
    $ 7.5万
  • 项目类别:
    Continuing Grant
LTREB Renewal: Ecosystem response to climate change - role of ecological subsidies and species interactions
LTREB 更新:生态系统对气候变化的响应 - 生态补贴和物种相互作用的作用
  • 批准号:
    1554702
  • 财政年份:
    2016
  • 资助金额:
    $ 7.5万
  • 项目类别:
    Continuing Grant
OCEAN ACIDIFICATION - COLLABORATIVE RESEARCH: OMEGAS II - Linking ecological and organismal responses to the ocean acidification seascape in the California Current System
海洋酸化 - 合作研究:OMEGAS II - 将生态和生物反应与加州洋流系统中海洋酸化海景联系起来
  • 批准号:
    1220338
  • 财政年份:
    2012
  • 资助金额:
    $ 7.5万
  • 项目类别:
    Standard Grant
Collaborative Research: The role of calcifying algae as a determinant of rocky intertidal macrophyte community structure at a meta-ecosystem scale
合作研究:钙化藻类作为元生态系统尺度岩石潮间带大型植物群落结构的决定因素的作用
  • 批准号:
    1061233
  • 财政年份:
    2011
  • 资助金额:
    $ 7.5万
  • 项目类别:
    Standard Grant
LTREB: Ecosystem response to climate change: role of ecological subsidies and species interactions
LTREB:生态系统对气候变化的响应:生态补贴和物种相互作用的作用
  • 批准号:
    1050694
  • 财政年份:
    2011
  • 资助金额:
    $ 7.5万
  • 项目类别:
    Continuing Grant
OCEAN ACIDIFICATION - Category 1: COLLABORATIVE RESEARCH: Acclimation and adaptation to ocean acidification of key ecosystem components in the California Current System
海洋酸化 - 第 1 类:合作研究:加州洋流系统关键生态系统组成部分对海洋酸化的适应和适应
  • 批准号:
    1041240
  • 财政年份:
    2010
  • 资助金额:
    $ 7.5万
  • 项目类别:
    Standard Grant
EAGER: Initiation of a pH/pCO2-sensing mooring platform on the Oregon coast
EAGER:在俄勒冈州海岸启动 pH/pCO2 感应系泊平台
  • 批准号:
    0956197
  • 财政年份:
    2009
  • 资助金额:
    $ 7.5万
  • 项目类别:
    Standard Grant
Collaborative Research: Scaling up from community to meta-ecosystem dynamics in the rocky intertidal - a comparative-experimental approach
合作研究:从群落扩展到岩石潮间带元生态系统动力学——一种比较实验方法
  • 批准号:
    0726983
  • 财政年份:
    2007
  • 资助金额:
    $ 7.5万
  • 项目类别:
    Standard Grant

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