Collaborative Research: Adaptation of daphniids to digestion resistant resources
合作研究:水蚤对抗消化资源的适应
基本信息
- 批准号:0235118
- 负责人:
- 金额:--
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2003
- 资助国家:美国
- 起止时间:2003-04-01 至 2008-03-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
The consumption of algae by invertebrates is a critical but poorly understood link in the food webs of all aquatic ecosystems: lakes, streams and oceans. Previous research has shown that the productivity of these invertebrate grazers, and hence the productivity of the rest of the food web including the fisheries, is often limited by the quality of the algal food. In the open water of lakes, a major determinate of algal food quality is their resistance to digestion while in the gut of the grazer. While it has been long known that some algae may pass unharmed through the guts of small invertebrates, the broad relevance of this defense mechanism to food web ecology and to the evolutionary biology of the grazers has been ignored. Major goals of this research will be to examine the physiology of grazer digestion of resistant algae, to quantify the extent to which grazer species vary in ability to overcome digestion defenses, and to experimentally test the importance of this grazer-algae interaction to the functioning of aquatic food webs. The general research approach will be to focus on an easily studied organism that is also a major grazer of algae in the open water of lakes: daphniids. Using both cultured and natural algae that differ in digestion resistance, this research will measure feeding rate, gut processing, respiration, assimilation, and growth of daphniid grazers. Several species, representing the breadth of diversity within the daphniids, will be studied at various animal ages from juvenile to adult. Finally, the ecological consequences of variation in grazer digestive physiology will be examined using a large-scale enclosure experiment in a natural lake. The experiment will manipulate grazer species and test the hypothesis that grazer digestive physiology influences population dynamics of grazers and algae in lakes.This research is innovative in exploring the diversity of feeding and gut processing in an ecologically key group of grazers, and in testing the consequences of this physiological diversity to food web function. Despite their role as dominate grazers in the open water of lakes, there is little understanding of how daphniids digest algae in nature. Similarly, while it is known that algae vary in digestion resistance, there is little understanding of how grazers adapt to such defenses. It is the general aim of this research to address these two deficiencies by studying the ecological and evolutionary physiology that constrains grazer-algal interactions in aquatic ecosystems.Training of undergraduates and graduates at the interface of physiology and ecology is emphasized in this research. The proposed work will also continue a research and training partnership between a primarily undergraduate institution and a research-intensive field station, and provide for year-round undergraduate involvement in laboratory and field studies that link organism physiology to the structure and function of food webs.
无脊椎动物对藻类的消耗是所有水生生态系统(湖泊、溪流和海洋)食物网中一个关键但知之甚少的环节。 先前的研究表明,这些无脊椎食草动物的生产力,以及包括渔业在内的其他食物网的生产力,往往受到藻类食物质量的限制。 在湖泊的开阔水域,藻类食物质量的主要决定因素是它们在食草动物肠道中的消化阻力。 虽然人们早就知道一些藻类可能会毫发无伤地穿过小型无脊椎动物的肠道,但这种防御机制与食物网生态学和食草动物进化生物学的广泛相关性却被忽视了。 这项研究的主要目标将是研究的抗藻类的食草动物消化的生理,以量化的程度不同的食草动物物种的能力,克服消化防御,并通过实验测试的重要性,这种食草动物藻类相互作用的水生食物网的功能。一般的研究方法将集中在一个容易研究的生物体,也是一个主要的食草藻类在湖泊的开放水域:水蚤。 本研究将利用不同消化抗性的人工养殖和天然藻类,测量水蚤类食草动物的摄食率、肠道加工、呼吸、同化和生长。 几个物种,代表的daphniids内的多样性的广度,将在不同的动物年龄从少年到成年人进行研究。 最后,在食草动物消化生理变化的生态后果将使用大规模的封闭实验在一个天然湖泊进行检查。 该实验将操纵食草动物物种,并测试食草动物消化生理影响食草动物和藻类在lakes.This研究的种群动态的假设是创新的,探索在生态学上的关键群体的食草动物的摄食和肠道加工的多样性,并在测试这种生理多样性的后果,食物网功能。 尽管它们在湖泊的开放水域中扮演着主导食草动物的角色,但人们对水蚤如何消化自然界中的藻类知之甚少。 同样,虽然已知藻类在消化抗性方面各不相同,但对食草动物如何适应这种防御却知之甚少。 本研究的目的是通过研究限制水生生态系统中食藻相互作用的生态学和进化生理学来解决这两个问题,并强调对本科生和研究生进行生理学和生态学接口的培训。 拟议的工作还将继续一个主要的本科院校和一个研究密集型实地站之间的研究和培训伙伴关系,并提供全年的本科生参与实验室和实地研究,将生物体生理学与食物网的结构和功能联系起来。
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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Stephen Hamilton其他文献
Selection of <em>Pichia pastoris</em> strains expressing recombinant immunoglobulin G by cell surface labeling
- DOI:
10.1016/j.jim.2010.03.007 - 发表时间:
2010-06-30 - 期刊:
- 影响因子:
- 作者:
Song Lin;Zheng Shen;Dongxing Zha;Nathan Sharkey;Bianka Prinz;Stephen Hamilton;Tej Venkatachalam Pavoor;Beata Bobrowicz;Seemab S. Shaikh;Alissa M. Rittenhour;Thomas I. Potgieter;Piotr Bobrowicz;Terrance A. Stadheim - 通讯作者:
Terrance A. Stadheim
A survey of job satisfaction, sources of stress and psychological symptoms among New Zealand health professionals.
对新西兰卫生专业人员的工作满意度、压力来源和心理症状的调查。
- DOI:
- 发表时间:
2001 - 期刊:
- 影响因子:0
- 作者:
A. Dowell;Travis Westcott;D. Mcleod;Stephen Hamilton - 通讯作者:
Stephen Hamilton
Establishing an equipoise: Does the use of acellular dermal matrices in pre-pectoral implant-based breast reconstruction improve outcomes?
- DOI:
10.1016/j.bjps.2024.09.041 - 发表时间:
2024-12-01 - 期刊:
- 影响因子:
- 作者:
Hannah Cook;David Zargaran;Sevasti Panagiota Glynou;Alexander Zargaran;Mo Akhavani;Norman Williams;Stephen Hamilton;Afshin Mosahebi;Lorna Cook;Alison Waterworth;Mina Youssef;Kaustuv Das;Chandeena Roshanlall;Jaroslaw Krupa;Abdul Kasem;Julia Massey;Louise Merker;Huma Irshad;Sally Ng;Giorgio Desantis - 通讯作者:
Giorgio Desantis
Spatial Procurement of Farm Products and the Supply of Processed Foods: Application to the Tomato Processing Industry
- DOI:
10.1007/s11151-023-09939-5 - 发表时间:
2024-01-13 - 期刊:
- 影响因子:0.700
- 作者:
Stephen Hamilton;Scott Kjorlien;Ethan Ligon;Aric Shafran - 通讯作者:
Aric Shafran
Acute tubulointerstitial nephritis: phenotype of infiltrating cells and prognostic impact of tubulitis
急性肾小管间质性肾炎:浸润细胞的表型和肾小管炎的预后影响
- DOI:
- 发表时间:
1996 - 期刊:
- 影响因子:3.5
- 作者:
B. Iványi;Stephen Hamilton;Hans Erik Hansen;Steen Olsen - 通讯作者:
Steen Olsen
Stephen Hamilton的其他文献
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{{ truncateString('Stephen Hamilton', 18)}}的其他基金
LTER: The Ecology of Row Crop Ecosystems and Landscapes at the KBS LTER Site
LTER:KBS LTER 站点的中耕作物生态系统和景观的生态学
- 批准号:
1637653 - 财政年份:2016
- 资助金额:
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Continuing Grant
DISSERTATION RESEARCH: Hydrological controls of riverine ecosystems of the Napo River (Amazon Basin): Implications for the management and conservation of biodiversity
论文研究:纳波河(亚马逊流域)河流生态系统的水文控制:对生物多样性管理和保护的影响
- 批准号:
1011297 - 财政年份:2010
- 资助金额:
-- - 项目类别:
Standard Grant
Dissertation Research: Phosphorus Cycling in Shallow Freshwater Ecosystems
论文研究:浅层淡水生态系统中的磷循环
- 批准号:
0910008 - 财政年份:2009
- 资助金额:
-- - 项目类别:
Standard Grant
Water Level Fluctuations and Internal Eutrophication in Lakes and Wetlands
湖泊和湿地的水位波动和内部富营养化
- 批准号:
0743402 - 财政年份:2008
- 资助金额:
-- - 项目类别:
Continuing Grant
DISSERTATION RESEARCH: Importance of Novel Microbial Pathways of Nitrate Uptake by Freshwater Sediments
论文研究:淡水沉积物吸收硝酸盐的新型微生物途径的重要性
- 批准号:
0508704 - 财政年份:2005
- 资助金额:
-- - 项目类别:
Standard Grant
Role of Microbial Sulfur Oxidation in Nitrogen Removal by Wetlands and Streams
微生物硫氧化在湿地和溪流脱氮中的作用
- 批准号:
0516076 - 财政年份:2005
- 资助金额:
-- - 项目类别:
Continuing Grant
Dissertation Research: Anaerobic Mirobial Metabolism and the Biogeochemical Functioning of Wetlands
论文研究:厌氧微生物代谢和湿地的生物地球化学功能
- 批准号:
0072980 - 财政年份:2000
- 资助金额:
-- - 项目类别:
Standard Grant
CAREER: Hydrologic Regulation of Wetland Biogeochemistry and Ecology and the Impacts of Climate Change
职业:湿地生物地球化学和生态的水文调控以及气候变化的影响
- 批准号:
9701714 - 财政年份:1997
- 资助金额:
-- - 项目类别:
Continuing Grant
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- 批准号:10774081
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