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
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It is found that the magnitude of pollen limitation observed in natural populations depends on both historical constraints and contemporary ecological factors.Abstract:
▪ Abstract Quantifying the extent to which seed production is limited by the availability of pollen has been an area of intensive empirical study over the past few decades. Whereas theory predicts that pollen augmentation should not increase seed production, numerous empirical studies report significant and strong pollen limitation. Here, we use a variety of approaches to examine the correlates of pollen limitation in an effort to understand its occurrence and importance in plant evolutionary ecology. In particular, we examine the role of recent ecological perturbations in influencing pollen limitation and discuss the relation between pollen limitation and plant traits. We find that the magnitude of pollen limitation observed in natural populations depends on both historical constraints and contemporary ecological factors.read more
Citations
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Some Evolutionary Consequences of Being a Tree
J. Petit,Arndt Hampe +1 more
TL;DR: It is discussed why the tree growth habit should lead to these seemingly paradoxical features, such as great size, longevity, and high reproductive output.
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Is There a Latitudinal Gradient in the Importance of Biotic Interactions
TL;DR: The hypothesis that biotic interactions are more important in the tropics is supported, but additional research is needed on latitudinal comparisons of rates of molecular evolution for genes involved inBiotic interactions, estimates of gradients in interaction strength, and phylogenetic comparisons of the traits that med...
Is There a Latitudinal Gradient in the Importance of
TL;DR: This article found that biotic interactions are more important at low latitudes than high latitudes for a wide range of interactions, including herbivory and insect predation in the tropics, and predominantly tropical mutualisms such as cleaning symbioses and ant-plant interactions.
Journal ArticleDOI
Stability of pollination services decreases with isolation from natural areas despite honey bee visits
Lucas Alejandro Garibaldi,Lucas Alejandro Garibaldi,Ingolf Steffan-Dewenter,Claire Kremen,Juan M. Morales,Riccardo Bommarco,Saul A. Cunningham,Luísa G. Carvalheiro,Natacha P. Chacoff,Jan H. Dudenhöffer,Sarah S. Greenleaf,Andrea Holzschuh,Andrea Holzschuh,Rufus Isaacs,Kristin M. Krewenka,Yael Mandelik,Margaret M. Mayfield,Lora A. Morandin,Simon G. Potts,Taylor H. Ricketts,Hajnalka Szentgyörgyi,Blandina Felipe Viana,Catrin Westphal,Rachael Winfree,Alexandra M. Klein +24 more
TL;DR: Wild pollinators are relevant for crop productivity and stability even when honey bees are abundant, and policies to preserve and restore natural areas in agricultural landscapes should enhance levels and reliability of pollination services.
Journal ArticleDOI
Insect Declines in the Anthropocene
TL;DR: Because the geographic extent and magnitude of insect declines are largely unknown, there is an urgent need for monitoring efforts, especially across ecological gradients, which will help to identify important causal factors in declines.
References
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