scholarly journals Responses of pre-dispersal seed predators to sequential flowering of Dipterocarps in Malaysia

Biotropica ◽  
2016 ◽  
Vol 49 (2) ◽  
pp. 177-185 ◽  
Author(s):  
Tetsuro Hosaka ◽  
Takakazu Yumoto ◽  
Yu-Yun Chen ◽  
I-Fang Sun ◽  
S. Joseph Wright ◽  
...  
Keyword(s):  
Seed Predators ◽  
Sequential Flowering

Individual crop size increases predispersal predation by beetles in a tropical palm

2020 ◽  
pp. 1-4
Author(s):  
Morgana Maria Arcanjo Bruno ◽  
Klécia Gili Massi ◽  
Alexander V. Christianini ◽  
John du Vall Hay
Keyword(s):  
Seed Predation ◽  
Positive Influence ◽  
Reproductive Phenology ◽  
Individual Plant ◽  
Crop Size ◽  
Seed Predators ◽  
Plant Trait ◽  
Predispersal Seed Predation ◽  
Total Seed ◽  
Number Of Seeds

Abstract Predispersal seed predation is one of the main causes of seed mortality in plant populations, contributing to decreased plant recruitment. Seed loss has previously been found to be related to crop size. Thus, we examined the influence of individual crop size on predispersal seed predation by beetles in the palm Syagrus flexuosa in the Brazilian savanna. The study was carried out in three tropical woodland savanna sites, where we sampled the total seed crop of 46 fruiting palms and checked the presence of beetle larvae inside all seeds per plant. We observed predispersal seed predation of S. flexuosa from all sites and a high variation in the number of seeds preyed on per individual palm. Crop size had a positive influence on the number of seeds lost to predispersal seed predators. Variations in levels of predispersal seed predation may also be accounted for by the reproductive phenology of S. flexuosa. If fruits are not available at the same time, less resource is available for predators and therefore a high proportion of seeds may be preyed on. Thus, our study demonstrates that an individual plant trait, crop size, is an important predictor of beetle seed damage per palm and a driver of the number of seeds lost to predispersal seed predators.

Plant ploidy level influences selection by butterfly seed predators

Oikos ◽  
2008 ◽  
Vol 117 (7) ◽  
pp. 1020-1025 ◽  
Author(s):  
Leena Arvanitis ◽  
Christer Wiklund ◽  
Johan Ehrlén
Keyword(s):  
Ploidy Level ◽  
Seed Predators

Granivorous Birds as Potentially Important Post-dispersal Seed Predators in a Brazilian Forest Fragment1

Biotropica ◽  
10.1646/03040 ◽  
2004 ◽  
Vol 36 (3) ◽  
pp. 417
Author(s):  
Marco A. Pizo ◽  
Emerson M. Vieira
Keyword(s):  
Seed Predators

scholarly journals Ground beetles (Carabidae) as seed predators

2003 ◽  
Vol 100 (4) ◽  
pp. 531-544 ◽  
Author(s):  
Alois HONEK ◽  
Zdenka MARTINKOVA ◽  
Vojtech JAROSIK
Keyword(s):  
Ground Beetles ◽  
Seed Predators

scholarly journals Insetos predadores de sementes de Cassia leptophylla e a relação entre os períodos pré e pós-dispersivos / Seed predators insects of Cassia leptophylla and the pre and post-dispersive periods relantionships

2016 ◽  
Vol 12 (2) ◽  
pp. 112
Author(s):  
Cristiano Marcondes Pereira ◽  
Huilquer Francisco Vogel ◽  
Mauricio Osvaldo Moura
Keyword(s):  
Seed Predators

Este trabalho determinou quais espécies de insetos predam as sementes de Cassia leptophylla, durante os períodos pré e pós-dispersivo, em uma área de preservação, localizada no município de Reserva do Iguaçu, Paraná, Brasil. Foram avaliados parâmetros de abundância e sazonalidade e o índice de predação de sementes, com duas hipóteses sendo apresentadas: se a predação de sementes por insetos é contínua durante ambos os períodos dispersivos; e se mesma guilda de insetos efetua a predação. Três espécies foram encontradas predando as sementes de C. leptophylla; na pré-dispersão, Pygiopachymerus lineola, Sennius leptophyllicola e Cydia tonosticha. Houve exceção da presença de S. leptophyllicola no período de pós-dispersão. O resultado evidencia a importância do recurso alimentar proporcionado pelas sementes, para os insetos predadores, os quais predaram 42% das sementes viáveis ao final de um ciclo de frutificação da planta. As diferenças na abundância de indivíduos entre os períodos dispersivos relacionam-se provavelmente a características bionômicas e ecológicas intrínsecas, podendo evidenciar maior especialização das espécies com relação à capacidade de explorar nichos distintos.

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