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COEXISTENCE IN STREAM METACOMMUNITIES

流元社区中的共存

基本信息

批准号：
1050459
负责人：
Winsor Lowe
金额：
$ 38万
依托单位：
University of Montana
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2011
资助国家：
美国
起止时间：
2011-04-01 至 2017-03-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1050459&HistoricalAwards=false
关键词：
COEXISTENCE STREAM METACOMMUNITIES

项目摘要

This research explores how ecological and evolutionary processes interact to maintain species diversity in natural communities. Classic ecological theory predicts that immigration can allow species that are poor competitors for resources to persist in natural communities, thereby maintaining regional biodiversity. However, topography, moisture, forest cover, and other landscape conditions cause variation in rates of immigration among local communities. These landscape conditions should also influence local adaptation of species by creating variation in gene flow. Therefore, differences in adaptation and immigration within species may be as important for understanding patterns of biodiversity as differences among species. The goal of this project is to understand how local adaptation and competitive interactions among species are affected by variation in immigration and gene flow within species. This research will test the hypothesis that species coexistence and the resulting pattern of biodiversity in complex landscapes are products of the interactive, adaptive effects of gene flow and the demographic effects of immigration. This project will focus on two species of stream salamander for which there is much prior research on their ecological interactions, but little is known about the effects of immigration and gene flow on species coexistence. The two study species occur together throughout the Appalachian Mountains despite a large difference in competitive ability, and previous studies have documented landscape effects on immigration and gene flow in both species. This project will create OPEnBio: Opportunities and Perspectives in Environmental Biology, a professional career exploration program that capitalizes on the diversity of people and institutions in environmental biology in New England and the Northern Rockies. Internships will be offered in both regions to attract American Indian undergraduates, who will get to know diverse role models and engage in a variety of approaches to research, application, and outreach. Through related coursework and links to other diversity programs, OPEnBio will increase retention of underrepresented students, show them diverse perspectives in science, and expand the use of traditional ecological knowledge in environmental biology.

这项研究探讨了生态和进化过程如何相互作用，以维持自然群落中的物种多样性。经典生态学理论预测，移民可以让那些对资源竞争力差的物种在自然群落中生存下来，从而保持区域生物多样性。然而，地形、湿度、森林覆盖和其他地貌条件导致当地社区移民率的变化。这些景观条件也应该通过创造基因流的变化来影响物种的当地适应。因此，物种内部适应和迁移的差异对于理解生物多样性的模式可能与物种之间的差异一样重要。该项目的目标是了解物种间的局部适应和竞争相互作用如何受到移民和物种内基因流动变化的影响。这项研究将测试的假设，物种共存和由此产生的模式的生物多样性在复杂的景观是产品的相互作用，适应性的影响，基因流和移民的人口影响。该项目将集中在两个物种的溪蝾螈，有很多以前的研究，他们的生态相互作用，但很少有人知道移民和基因流对物种共存的影响。这两个研究物种一起发生在整个阿巴拉契亚山脉，尽管在竞争能力上有很大的差异，以前的研究已经记录了景观对这两个物种的移民和基因流的影响。该项目将创建OPEnBio：环境生物学的机会和视角，这是一个专业的职业探索计划，利用了新英格兰和北方落基山脉环境生物学人员和机构的多样性。将在这两个地区提供实习机会，以吸引美国印第安本科生，他们将了解不同的榜样，并参与各种研究，应用和推广方法。通过相关的课程和其他多样性计划的链接，OPEnBio将增加代表性不足的学生的保留，向他们展示科学的多样性观点，并扩大传统生态知识在环境生物学中的应用。