Disa Yu, Vanderbilt University August 21, 2014 Eco-Informatics Summer Institute, Summer 2014 Pollinators Research Project HJ Andrews Experimental
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1 Disa Yu, Vanderbilt University August 21, 2014 Eco-Informatics Summer Institute, Summer 2014 Pollinators Research Project HJ Andrews Experimental Forest and Oregon State University
2 How is the ecological health of the pollinator network in a montane meadow ecosystem, measured in terms of sustaining biodiversity stability resistance to species extinction affected by the composition of generalist and specialist pollinators: all generalists all specialists reality-reflecting combination of specialists and generalists
3 Scope of research project: data from Size of data: 147 flower species, 466 pollinator species R Program: flower abundance, pollinator abundance pollinators' flower preferences all generalist, all specialist, both generalist and specialist according to mentor Andy Moldenke Function that outputs the pollinator-flower interaction matrix: 3 interaction networks based on pollinator preference
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6 R Bipartite package: Compute indices: links per species, nestedness, weighted nestedness, niche overlap, and extinction slope Sustaining biodiversity : links per species, nestedness, weighted nestedness Stability: links per species, niche overlap Resistance to species extinction: extinction slope Three concepts interrelated, all indices could be used to measure, chosen the most apparently fitting indices to quantify each concept, for simplicity and ease of analysis
7 Three interaction matrices based on the three cases of pollinator preference; subsets All Generalists All Specialists Generalists and Specialists
8 Indices All Generalists All Specialists Both Links per Species Nestedness Weighted Nestedness NaN Niche Overlap Extinction Slope Key: Most favorable, Second-Most favorable, Least favorable
9 Sustaining biodiversity: generalist pollination network, closely followed by mixed pollination network Resistance to extinction: generalist pollination network, closely followed by mixed pollination network Stability: inconclusive Overall most ecologically healthy pollination network: generalist pollination network Pollination network with both generalists and specialists according to reality: reasonably ecologically healthy
10 I am grateful to the following Eco-Informatics Summer Institute mentors for their lectures, advice, and support. Jorge Ramirez, Julia Jones, Rebecca Hutchinson, Tom Dietterich, Andy Moldenke, Eddie Helderop, Vera Pfeiffer, Peggy Lee, Alan Stanton, Desirée Tullos I am also grateful for EISI REU Program NSF funding
11 Byrne, Roger. "Basic Concepts V: Niche Concepts and Ecological Valency." Geography 148- Biogeography Lecture. UNIVERSITY OF CALIFORNIA, BERKELEY. Web. 17 Aug Dormann, Carsten. "Networklevel {bipartite}." Inside-R. Revolution Analytics. Web. 17 Aug < r.org/packages/cran/bipartite/docs/.networklevel>. Dormann, Carsten F., Jochen Frund, Nico Bluthgen, and Bernd Gruber. "Indices, Graphs and Null Models: Analyzing Bipartite Ecological Networks." The Open Ecology Journal (2009): Print. Galeano, Javier, Juan M. Pastor, and Jose M. Iriondo. "Weighted-Interaction Nestedness Estimator (WINE): A New Estimator to Calculate over Frequency Matrices." Environmental Modelling & Software (2009): Print. Pfeiffer, Vera. "EISI Plant-Pollinator Network Project 2014." EISI REU Program. HJ Andrews Experimental Forest, Blue River, OR. 23 June Lecture. Staniczenko, Phillip P. A., Jason C. Kopp, and Stefano Allesina. "The Ghost of Nestedness in Ecological Networks." Nature Communications(2013): Print.
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