Endozoochory by native and exotic herbivores in dry areas: consequences for germination and survival of Prosopis seeds - BiologíaReportar como inadecuado




Endozoochory by native and exotic herbivores in dry areas: consequences for germination and survival of Prosopis seeds - Biología - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Autor: Campos, Claudia M.; Peco Vázquez, Begoña; Campos, Valeria E.; Malo Arrazola, Juan Esteban; Giannoni, Stella M.; Suárez Cardona, Francisco

Lugar: Cambridge University Press

Fecha de publicación: 2008

Detalles: 10.1017-S0960258508940344

Seed Science Research 18.2 (2008): p. 91-100

DOI: 10.1017-S0960258508940344

Editor-s Version: http:-dx.doi.org-10.1017-S0960258508940344

Área: Biología





Autor: Campos, Claudia M. - Peco Vázquez, Begoña - Campos, Valeria E. - Malo Arrazola, Juan Esteban - Giannoni, Stella M. - Suárez Cardona, Francisco

Fuente: https://repositorio.uam.es


Introducción



Seed Science Research (2008) 18, 91 – 100 DOI: 10.1017-S0960258508940344 Endozoochory by native and exotic herbivores in dry areas: consequences for germination and survival of Prosopis seeds Claudia M.
Campos1*, Begoña Peco2, Valeria E.
Campos3, Juan E.
Malo2, Stella M.
Giannoni3 and Francisco Suárez2 1 Grupo de Investigaciones de la Biodiversidad, IADIZA-CONICET, Argentina; 2Departamento de Ecologı́a, Universidad Autónoma de Madrid, Spain; 3Museo de Ciencias Naturales, Universidad Nacional de San Juan, Argentina Abstract Introduction Mammalian herbivores can play a role in the endozoochorous dispersal of Prosopis seeds in the arid zones of Argentina, and the introduction of exotic mammals can change relevant parameters of the plant’s reproductive ecology.
Our specific goals were to quantify the seeds of Prosopis flexuosa, P.
chilensis and P.
torquata contained in the faeces of native [mara (Dolichotis patagonum), guanaco (Lama guanicoe)] and exotic [donkey (Equus asinus) and hare (Lepus europaeus)] mammals, and to determine the mortality, germination percentage and germination speed of seeds borne in faeces, compared with those collected from trees.
In 2006, seeds were collected directly from trees or removed from mammal faeces.
Seeds were counted and classified as apparently healthy or damaged.
P.
torquata and P.
flexuosa seeds were found in the dung of guanaco, hare and mara, whereas only P.
flexuosa seeds appeared in donkey faeces.
P.
chilensis seeds were only found in guanaco faeces.
There was a notable relative abundance of seeds contained in small herbivore faeces in comparison to the large herbivores.
The passage through the digestive tract of animals modified seed germination capacity and speed, with great variability between animal species.
Guanacos had greater effects than donkeys on mortality, germination percentage and germination speed.
Differences between the effects of both smaller-sized herbivores on seeds were much smaller. Biol...






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