Data/hora: 25/06/2024 06:57:46

Biblioteca(s): | Embrapa Florestas.
Data corrente: | 15/09/2008
Data da última atualização: | 15/09/2008
Autoria: | AIRA, M.; DOMÍNGUEZ, J.
Título: | Effects of seabird (Phalacrocorax aristotelis L.) nesting on soil biota and nutrient mineralization.
Ano de publicação: | 2008
Fonte/Imprenta: | In: INTERNATIONAL COLLOQUIUM ON SOIL ZOOLOGY, 15; INTERNATIONAL COLLOQUIUM ON APTERYGOTA, 12., 2008, Curitiba. Biodiversity, conservation and sustainabele management of soil animal: abstracts. Colombo: Embrapa Florestas. Editors: George Gardner Brown; Klaus Dieter Sautter; Renato Marques; Amarildo Pasini. 1 CD-ROM.
Idioma: | Inglês

Conteúdo:

The existence of nutrient fluxes from water to land, and the consequences for the structure and
productivity of terrestrial ecosystems are well known. The activities of seabirds are a type of
water-land flux about which little is known, especially during the nesting season when breeding
birds move more often between water and land and also spend more time on land than at other
stages. We studied the effects that nesting activities of the European shag (Phalacrocorax
aristotelis, L.) have on soil biochemical properties and the composition of soil microfauna on
the Cíes Islands (NW Spain). We sampled fresh soil inside and outside of the nests (paired
samples, n=7). Soil inside the nest had a lower organic matter content, and higher electric
conductivity and dissolved organic carbon content than the soil outside the nests. There were no
differences in N pools in the soil samples from inside and outside of the nests. Microbial biomass
and C mineralization were greater in soil from inside than from outside of the nests. Nesting did
not modify the composition of nematode communities (bacterivores, fungivores, omnivores and
herbivores), although the soil outside the nest supported a more abundant and diverse nematode
community. The present results suggest that nesting did not produce differences in the
decomposer community in the soil inside the nest, despite of it seems to be more efficient since
C mineralization is greater. However, the lack of differences in most of the variables analyzed,
as well as in the composition of nematode populations indicates the instability and high turnover
rate of these two soil systems. In fact, it appears that there are no differences in the belowground
communities of live organic matter systems (plants) or dead organic matter systems
(nests) on the Cíes Islands

Categoria do assunto: | --
Registro original: | Embrapa Florestas (CNPF)
Exemplares: | CNPF - (43552-1) - UPE - PL - -- - CD0305 -  -  - DIS