Back to Search
Start Over
Changes in arbuscular mycorrhizal fungal communities along a river delta island in northeastern Brazil
- Source :
- Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA-Alice), Empresa Brasileira de Pesquisa Agropecuária (Embrapa), instacron:EMBRAPA
- Publication Year :
- 2017
- Publisher :
- Elsevier BV, 2017.
-
Abstract
- Arbuscular mycorrhizal fungi (AMF) play a key role in the maintenance of the balance of terrestrial ecosystems, but little is known about the biogeography of these fungi, especially on tropical islands. This study aims to compare AMF community structure along a transect crossing a fluvial-marine island and relate these communities with soil and vegetation parameters to shed light on the forces driving AMF community structure on a local scale. We tested the hypothesis that the composition of AMF communities changes across the island, even within short distances among sites, in response to differences in edaphic characteristics and vegetation physiognomies. We sampled roots and soils in five different natural and degraded habitats: preserved mangrove forest (MF), degraded mangrove forest (MD), natural Restinga forest (RF), and two regeneration Restinga forests (RR1 and RR2) on Ilha da Restinga, northeastern Brazil. We determined the mycorrhizal colonization rate and AMF community structure based on morphological spore identification. The island soils were sandy with pH varying from acid to neutral; higher levels of organic matter were registered in RF and lower in MF; other chemical and physical soil attributes differed along the habitat types on the island. In total, 22 AMF species were identified, without any difference in species richness. However, the diversity and composition of AMF communities, spore abundance per families, and mycorrhizal colonization were statistically different among the habitats. The composition of AMF communities was strongly related to soil characteristics, especially the sum of exchangeable bases. Our results indicate that the different habitat types have diverse AMF communities even within short distances among habitats. In conclusion, islands with high spatial heterogeneity in soil parameters and diverse vegetation are potential refuges for the diversity conservation of AM fungi. Made available in DSpace on 2017-06-06T23:54:46Z (GMT). No. of bitstreams: 1 Changesarbuscular.pdf: 1192099 bytes, checksum: df199fc5c030c2aebd8b86efe24b5a3e (MD5) Previous issue date: 2017-02-08
- Subjects :
- 0106 biological sciences
biology
Ecology
Community structure
Edaphic
Vegetation
biology.organism_classification
Micorriza
010603 evolutionary biology
01 natural sciences
Spatial heterogeneity
Arbuscular mycorrhiza
Terrestrial ecosystem
Species richness
Mangrove
Ecology, Evolution, Behavior and Systematics
010606 plant biology & botany
Nature and Landscape Conservation
Subjects
Details
- ISSN :
- 1146609X
- Volume :
- 79
- Database :
- OpenAIRE
- Journal :
- Acta Oecologica
- Accession number :
- edsair.doi.dedup.....94f2f05e84b948443f2f67305a6feb56