Habitat partitioning and trophic levels of terrestrial macroinvertebrates of a Tyrrhenian coastal ecosystem (Grosseto, Italy)
| العنوان: | Habitat partitioning and trophic levels of terrestrial macroinvertebrates of a Tyrrhenian coastal ecosystem (Grosseto, Italy) |
|---|---|
| المؤلفون: | Isabella Colombini, Mauro Brilli, Mario Fallaci, Elena Gagnarli, Lorenzo Chelazzi |
| المصدر: | V International Symposium on Sandy Beaches-Sandy beaches and coastal zone management, pp. 25–35, Rabat, Marocco, 19-23 ottobre 2009 info:cnr-pdr/source/autori:Isabella Colombini; Mauro Brilli; Mario Fallaci; Elena Gagnarli; Lorenzo Chelazzi/congresso_nome:V International Symposium on Sandy Beaches-Sandy beaches and coastal zone management/congresso_luogo:Rabat, Marocco/congresso_data:19-23 ottobre 2009/anno:2011/pagina_da:25/pagina_a:35/intervallo_pagine:25–35 |
| سنة النشر: | 2011 |
| مصطلحات موضوعية: | Ecological indices, Energy flux, Mediterranean coastal ecosystem, Terrestrial macroinvertebrates, Stable isotopes |
| الوصف: | A study was conducted on a Tyrrhenian sandy beach ecosystem to examine habitat partitioning of macroinvertebrates in relation to the abiotic factors and to the vegetation and to assess links with trophic webs. The study site was located in the Maremma Regional Park, in an area where the beach was undergoing a process of aggradation and thus was in a continuous dynamic state. The site was characterised by a dune slack that could be periodically flooded by heavy rain or invaded by marine water during violent sea storms. Monthly surveys were carried out for an entire year along two transects regularly set from the shoreline to the retrodune. Plants were assessed through quadrat sampling whereas macroinvertebrates were caught with pitfall traps perpendicular to the shoreline. Species diversity (? and ? diversity), richness and abundance were calculated together with mean zonations for both plants and terrestrial invertebrate species. Using Hierarchical cluster analysis plants were grouped into two clusters according to the abiotic factors whereas macroinvertebrates into four, according to abiotic factors and to the vegetation. For the most abundant species isotopic signature of ?13C and ?15N were assessed and cluster analysis was again preformed. Multi-source mixing models were used to identify trophic levels and the relative contribution of each food sources to the diets of each group of macroinvertebrates. The results of the annual ? diversity value indicated a very rich invertebrate community highly correlated to the complexity of the habitat and a ? diversity value that showed changes in the composition of the community every 40 m. The influence of marine subsides in the food web decreased at increasing distance from the sea and distinctive food webs were found according to the species zonation patterns. Some species mainly depended upon marine subsides (wrack debris), others, although inhabiting beach areas, were tied to both marine and terrestrial food sources whereas dune slack species were linked to terrestrial items. The work showed that in a spatially limited but complex environment, as is a beach - dune - slack system, marine wracks mainly subsided macroinvertebrates species of the eulittoral and contributed very little to the energy budget of more terrestrial species. |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=cnr_________::e8e363769bdb0d0d73ffc70f57c45937 https://publications.cnr.it/doc/83304 |
| Rights: | RESTRICTED |
| رقم الانضمام: | edsair.cnr...........e8e363769bdb0d0d73ffc70f57c45937 |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |