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
基本信息
- 批准号:0727611
- 负责人:
- 金额:$ 18.85万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2007
- 资助国家:美国
- 起止时间:2007-08-15 至 2011-07-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
The meta-ecosystem concept hypothesizes that the dynamics of ecological communities reflect interdependence between local-scale and ecosystem processes that vary across large distances. Thus, variation among communities depends not only on locally-varying species interactions and abiotic factors, such as physical disturbance, but also on regionally- and globally-varying ecosystem processes, such as dispersal and flows of materials such as nutrients and carbon. This study of rocky intertidal communities and the factors underlying their variation addresses the issue of meta-ecosystem dynamics. The goal of this project is to understand how variability in oceanographic subsidies, such as nutrients and phytoplankton, influences benthic community structure in the northern California Current Large Marine Ecosystem. Local-scale variation in upwelling along the Oregon and northern California coasts will be used to understand how changes in nutrients and productivity influence benthic-pelagic coupling, its effect on benthic species interactions, and ultimately rocky intertidal community structure. A conceptual model, in which the independent variable is seawater temperature (SWT), is used to predict how the dual effect of nutrients and light on marine benthic and pelagic primary production generates different community outcomes in the low intertidal zone. The two ""endpoints" of community structure are a dominance of filter feeding invertebrates or macroalgae. The model predicts that with low (cold) SWT, nutrient and light availability is high, and macrophytes are dominant. Under very high nutrients and light, competitively dominant kelps will prevail and possibly facilitate stress-intolerant macroalgal species, and as nutrients and light diminish, kelp dominance should switch to dominance by surfgrass and foliose understory algae. With higher (warmer) SWT, conditions favor high phytoplankton production, leading to dominance by sessile invertebrates. High phytoplankton also creates low light and low nutrient conditions, negatively affecting growth of macroalgae and their ability to compete with sessile invertebrates. Research will be conducted at 15 sites nested within five capes spanning the 1300 km range of the study region. A water sampling program will quantify concentrations of nutrients and phytoplankton, field-deployed remote sensors will provide time-series estimates of light and chlorophyll a, and surveys will quantify community structure. Manipulative field experiments will test the role of species interactions on community structure and how interactions vary with ecological subsidies.Broader Impacts: Three of the PIs (Hacker, Menge, Nielsen) have undergraduate and graduate teaching responsibilities, which involve instruction and training in marine ecology. Each makes a major effort to foster the participation of underrepresented groups in lab and field activities; Menge, Hacker and Nielsen''''s lab groups consist mostly or entirely of women. Nielsen''''s position at Somona State University (SSU), a four-year undergraduate institution with few funded research programs, offers a rare chance for SSU undergraduates to participate in a first-rate research experience. Finally, the work will provide insight into the consequences of predicted changes in upwelling regimes due to human activity and climate change, thereby giving the research societal significance. Knowledge of the importance of benthic-pelagic coupling to the dynamics of rocky intertidal communities is crucial to manage and conserve marine communities facing human-induced variation in climate. The PIs will work with a policy and outreach program to communicate the research beyond academic circles to the wider public and stakeholders.
元生态系统概念假设生态群落的动态反映了局部规模和生态系统过程之间的相互依赖,这些过程在很大程度上是不同的。因此,群落之间的变化不仅取决于局部变化的物种相互作用和非生物因素,如物理干扰,而且还取决于区域和全球变化的生态系统过程,如养分和碳等物质的扩散和流动。这项关于岩石潮间带群落及其变化因素的研究解决了元生态系统动力学问题。该项目的目标是了解营养物质和浮游植物等海洋补贴的可变性如何影响加州北部当前大型海洋生态系统的底栖生物群落结构。俄勒冈州和加利福尼亚州北部海岸上升流的局部尺度变化将被用来理解营养物质和生产力的变化如何影响底栖-远洋耦合,它对底栖物种相互作用的影响,并最终影响岩石潮间带群落结构。一个自变量为海水温度(SWT)的概念模型被用来预测营养物质和光照对海洋底栖和远洋初级生产力的双重影响如何在低潮间带产生不同的群落结果。群落结构的两个“端点”是滤食性无脊椎动物或大型藻类的优势。该模型预测,在低(冷)SWT条件下,养分和光能利用率高,以大型植物为主。在非常高的营养和光照条件下,具有竞争优势的海藻将占上风,并可能促进不耐受压力的大型藻类物种的生长,随着营养和光照的减少,海藻的优势应该转变为由冲浪草和带叶的林下藻类主导。SWT越高(温暖),浮游植物产量越高,固着的无脊椎动物就越占优势。高浮游植物还造成低光照和低营养条件,对大型藻类的生长和它们与固着无脊椎动物竞争的能力产生负面影响。研究将在研究区域1300公里范围内的五个海角内嵌套的15个地点进行。水样计划将量化营养物质和浮游植物的浓度,现场部署的远程传感器将提供对光线和叶绿素a的时间序列估计,调查将量化群落结构。操纵性的野外实验将测试物种相互作用对群落结构的作用,以及相互作用如何随着生态补贴的变化而变化。广泛的影响:三名PI(Hacker,Menger,Nielsen)有本科生和研究生的教学职责,涉及海洋生态学的教学和培训。每个实验室小组都作出重大努力,促进代表性不足的群体参与实验室和现场活动;门格、黑客和尼尔森“”S实验室小组主要或全部由女性组成。索莫纳州立大学是一所四年制本科院校,几乎没有资助的研究项目,尼尔森在索莫纳州立大学的S职位为索莫纳州立大学的本科生提供了参与一流研究经历的难得机会。最后,这项工作将提供对由于人类活动和气候变化而导致的上升流制度预测变化的后果的洞察,从而赋予这项研究社会意义。了解底栖-中上层耦合对岩质潮间带群落动态的重要性,对于管理和养护面临人类引起的气候变化的海洋群落至关重要。PIS将与政策和外联计划合作,将研究成果传达给学术界以外的更广泛的公众和利益相关者。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Karina Nielsen其他文献
Correction to: In the eye of the beholder: how self-other agreements influence leadership training outcomes as perceived by leaders and their followers
- DOI:
10.1007/s10869-021-09735-6 - 发表时间:
2021-02-08 - 期刊:
- 影响因子:4.900
- 作者:
Karina Nielsen;Susanne Tafvelin;Ulrica von Thiele Schwarz;Henna Hasson - 通讯作者:
Henna Hasson
Validation of Sentinel-6MF based lake levels - an assessment with in-situ data and other satellite altimetry data
基于 Sentinel-6MF 的湖泊水位验证 - 使用现场数据和其他卫星测高数据进行评估
- DOI:
- 发表时间:
2024 - 期刊:
- 影响因子:2.6
- 作者:
Bjarke Nilsson;Karina Nielsen - 通讯作者:
Karina Nielsen
Exploitation of satellite earth observation datasets for hydrologic analysis of large reservoirs in Thailand
利用卫星地球观测数据集对泰国大型水库进行水文分析
- DOI:
10.1016/j.jhydrol.2025.133085 - 发表时间:
2025-10-01 - 期刊:
- 影响因子:6.300
- 作者:
Landi Zeng;Theerapol Charoensuk;Connor Chewning;Daniel Druce;Christian Toettrup;Karina Nielsen;Peter Bauer-Gottwein - 通讯作者:
Peter Bauer-Gottwein
The Fair Share – Multilevel Distributive Justice as Cross-Level Moderator for the Impact of Restructuring Perceptions
公平份额——多层次分配正义作为重组观念影响的跨层次调节者
- DOI:
10.1080/14697017.2024.2337443 - 发表时间:
2024 - 期刊:
- 影响因子:3
- 作者:
Birgit Thomson;Kai N. Klasmeier;Karina Nielsen - 通讯作者:
Karina Nielsen
Risk perception and safety behaviors in high-risk workers: A systematic literature review
高风险工作者的风险认知与安全行为:一项系统文献综述
- DOI:
10.1016/j.ssci.2025.106811 - 发表时间:
2025-06-01 - 期刊:
- 影响因子:5.400
- 作者:
Giulia Priolo;Michela Vignoli;Karina Nielsen - 通讯作者:
Karina Nielsen
Karina Nielsen的其他文献
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{{ truncateString('Karina Nielsen', 18)}}的其他基金
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:
1519401 - 财政年份:2014
- 资助金额:
$ 18.85万 - 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:
1061530 - 财政年份:2011
- 资助金额:
$ 18.85万 - 项目类别:
Standard Grant
International Research Fellow Awards: Upwelling Patterns and Marine Plant-Herbivore Interactions: Linking Benthic and Pelagic Processes
国际研究员奖:上升流模式和海洋植物与草食动物的相互作用:连接底栖和远洋过程
- 批准号:
9802715 - 财政年份:1998
- 资助金额:
$ 18.85万 - 项目类别:
Fellowship Award
U.S.-Chile Planning Visit: Marine Macrophytes and Grazers: Linking Coastal Oceanography and Rocky Intertidal Community Ecology
美国-智利计划访问:海洋大型植物和食草动物:将沿海海洋学和岩石潮间带群落生态学联系起来
- 批准号:
9724735 - 财政年份:1997
- 资助金额:
$ 18.85万 - 项目类别:
Standard Grant
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- 项目类别:面上项目
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