Journal ArticleDOI
Pollen limitation of plant reproduction: Ecological and evolutionary causes and consequences
Tia-Lynn Ashman,Tiffany M. Knight,Janette A. Steets,Priyanga Amarasekare,Martin Burd,Diane R. Campbell,Michele R. Dudash,Mark O. Johnston,Susan J. Mazer,Randall J. Mitchell,Martin Morgan,William G. Wilson +11 more
TLDR
A change in approach is needed to determine whether pollen limitation reflects random fluctuations around a pollen–resource equilibrium, an adaptation to stochastic pollination environments, or a chronic syndrome caused by an environmental perturbation.Abstract:
Determining whether seed production is pollen limited has been an area of intensive empirical study over the last two decades. Yet current evidence does not allow satisfactory assessment of the causes or consequences of pollen limitation. Here, we critically evaluate existing theory and issues concerning pollen limitation. Our main conclusion is that a change in approach is needed to determine whether pollen limitation reflects random fluctuations around a pollen–resource equilibrium, an adaptation to stochastic pollination environments, or a chronic syndrome caused by an environmental perturbation. We formalize and extend D. Haig and M. Westoby's conceptual model, and illustrate its use in guiding research on the evolutionary consequences of pollen limitation, i.e., whether plants evolve or have evolved to ameliorate pollen limitation. This synthesis also reveals that we are only beginning to understand when and how pollen limitation at the plant level translates into effects on plant population dynamics...read more
Citations
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Journal ArticleDOI
Importance of pollinators in changing landscapes for world crops
Alexandra-Maria Klein,Bernard E. Vaissière,James H. Cane,Ingolf Steffan-Dewenter,Saul A. Cunningham,Claire Kremen,Teja Tscharntke +6 more
TL;DR: It is found that fruit, vegetable or seed production from 87 of the leading global food crops is dependent upon animal pollination, while 28 crops do not rely upon animalPollination, however, global production volumes give a contrasting perspective.
Journal ArticleDOI
Global pollinator declines: trends, impacts and drivers.
Simon G. Potts,Jacobus C. Biesmeijer,Claire Kremen,Peter J. Neumann,Oliver Schweiger,William E. Kunin +5 more
TL;DR: The nature and extent of reported declines, and the potential drivers of pollinator loss are described, including habitat loss and fragmentation, agrochemicals, pathogens, alien species, climate change and the interactions between them are reviewed.
Journal ArticleDOI
Pollination and other ecosystem services produced by mobile organisms: a conceptual framework for the effects of land-use change.
Claire Kremen,Neal M. Williams,Marcelo A. Aizen,Barbara Gemmill-Herren,Gretchen LeBuhn,Robert L. Minckley,Laurence Packer,Simon G. Potts,T'ai H. Roulston,Ingolf Steffan-Dewenter,Diego P. Vázquez,Rachael Winfree,Laurie Adams,Elizabeth E. Crone,Sarah S. Greenleaf,Timothy H. Keitt,Alexandra-Maria Klein,James Regetz,Taylor H. Ricketts +18 more
TL;DR: A conceptual model for exploring how one mobile-agent-based ecosystem service (MABES), pollination, is affected by land-use change, and then generalize the model to other MABES is developed.
Book
Allee Effects in Ecology and Conservation
TL;DR: This paper presents a meta-analyses of population dynamics: modelling demographic Allee effects and its implications for conservation, management, and policy.
Journal ArticleDOI
Pollen Limitation of Plant Reproduction: Pattern and Process
Tiffany M. Knight,Janette A. Steets,Jana C. Vamosi,Susan J. Mazer,Martin Burd,Diane R. Campbell,Michele R. Dudash,Mark O. Johnston,Randall J. Mitchell,Tia-Lynn Ashman +9 more
TL;DR: It is found that the magnitude of pollen limitation observed in natural populations depends on both historical constraints and contemporary ecological factors.
References
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