Reduced pollinator service and elevated pollen limitation at the geographic range limit of an annual plant

Ecology ◽  
2012 ◽  
Vol 93 (5) ◽  
pp. 1036-1048 ◽  
Author(s):  
David A. Moeller ◽  
Monica A. Geber ◽  
Vincent M. Eckhart ◽  
Peter Tiffin
Botany ◽  
2010 ◽  
Vol 88 (6) ◽  
pp. 601-606 ◽  
Author(s):  
Andrew C. McCall

Damage to flowers by herbivores, or florivory, can have direct impacts on gamete survival and can also indirectly affect fitness by reducing pollinator service. While recent studies have examined the impact of natural or artificial floral damage, very few researchers have manipulated both damage and pollen addition to see whether pollen limitation is enhanced by damage, and no workers, to my knowledge, have examined whether pollen limitation is dependent on the levels of florivory used. I used a pollen addition treatment and six levels of artificial floral damage to investigate whether damage increases pollen limitation and whether that pollen limitation becomes more severe with increasing numbers of petals damaged in Nemophila menziesii Hook. & Arn. I found that artificial floral damage that mimics natural florivore damage increases pollen limitation, and that this pollen limitation generally increased with increasing numbers of petals damaged. The treatment with the heaviest amount of damage did not suffer the most pollen limitation, perhaps because flowers in this treatment remained radially symmetric. These findings suggest that florivory may decrease pollen import through pollinator deterrence and could thus serve as a selective force on either floral or defense traits in outcrossing plant populations.


2019 ◽  
Vol 193 (6) ◽  
pp. 786-797 ◽  
Author(s):  
John W. Benning ◽  
Vincent M. Eckhart ◽  
Monica A. Geber ◽  
David A. Moeller

2019 ◽  
Vol 49 (3) ◽  
pp. 208-212 ◽  
Author(s):  
Rafael de FRAGA ◽  
Kelly TORRALVO

ABSTRACT The fringed leaf frog, Cruziohyla craspedopus is rarely sampled in the Brazilian Amazon, probably due to low detection probability associated with its arboreal habit. The knowledge about the species’ distribution stems from successive additions of occasional occurrence records, which indicate that the species is widely distributed throughout Amazonia. We present new occurrence records to update the geographic range of the species, which is hereby extended 224 km to the northeast. We also present morphological data from collected specimens and discuss the updated range from the geographic and ecological points of view. We show that the range of the leaf frog crosses several main tributaries along the southern bank of the Amazonas River, although the species occurrence is apparently limited by a minimum tree cover of 70%.


2011 ◽  
Vol 178 (S1) ◽  
pp. S44-S57 ◽  
Author(s):  
David A. Moeller ◽  
Monica A. Geber ◽  
Peter Tiffin

2021 ◽  
Author(s):  
Alexander A. Mauro ◽  
Julián Torres‐Dowdall ◽  
Craig A. Marshall ◽  
Cameron K. Ghalambor

1987 ◽  
Vol 65 (10) ◽  
pp. 2047-2056 ◽  
Author(s):  
Kaius Helenurm ◽  
Spencer C. H. Barrett

The flowering and fruiting phenologies of 12 boreal forest herbs were recorded during 1979 (flowering and fruiting) and 1980 (flowering only) in spruce–fir forests of central New Brunswick. The species studied were Aralia nudicaulis, Chimaphila umbellata, Clintonia borealis, Cornus canadensis, Cypripedium acaule, Linnaea borealis, Maianthemum canadense, Medeola virginiana, Oxalis montana, Pyrola secunda, Trientalis borealis, and Trillium undulatum. Flowering in the community occurred from mid-May to the end of July. The order of flowering was maintained in the 2 years, but the degree of synchronization of inflorescences differed in several species. Fruiting in the community began in mid-July and extended beyond the end of September. The percentage of buds that ultimately bore fruit ranged from 0 (Cypripedium acaule) to 61% (Aralia nudicaulis). With the exception of Cypripedium acaule, which received little pollinator service, the self-incompatible species, Cornus canadensis, Maianthemum canadense, and Medeola virginiana, experienced the lowest levels of fruit-set. Pollen limitation and predation of developing fruit appear to be the major factors limiting percentage fruit-set in boreal forest herbs. Fruit production varied with time of flowering of inflorescences in several species, with periods of low fruit-set tending to coincide with lower densities of flowering inflorescences. Significant rates of fruit removal by herbivores occurred in all sarocochorous species. Disappearance of fruits from infructescences ranged from 31 (Medeola virginiana) to 95% (Aralia nudicaulis), with highest removal rates occurring during periods of greatest fruit availability.


2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Cheng-Chen Pan ◽  
Hao Qu ◽  
Qi Feng ◽  
Lin-De Liu ◽  
Ha-Lin Zhao ◽  
...  

Ecology ◽  
2006 ◽  
Vol 87 (11) ◽  
pp. 2882-2894 ◽  
Author(s):  
Eric Sanford ◽  
Samuel B. Holzman ◽  
Robert A. Haney ◽  
David M. Rand ◽  
Mark D. Bertness

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