Consulta: subjectFacets:"Ecological interactions"
Registros recuperados: 4
Data/hora: 10/06/2024 08:57:56

Influence of environmental parameters on fish assemblage of a neotropical river with a flood pulse regime, Central Brazil
Provedor de dados: 83
Autores: Melo,Tatiana Lima de; Tejerina-Garro,Francisco Leonardo; Melo,Cesar Enrique de.
This study aims to determine which of twelve environmental parameters (five physicochemical and seven hydromorphological) influence on the fish assemblage structure of the lower Mortes River basin located in the Bananal floodplain of the Araguaia River basin, Central Brazil. Sampling was conducted in six stretches of 1000 m each during the high and low waters. Fish were captured using gill nets and environmental parameters were measured by portable equipment or determined visually. The co-inertia analysis indicated that two physicochemical (dissolved oxygen and water transparency), and four hydromorphological (channel width and depth, riparian vegetation cover and type of the riverside substrate) parameters structure the fish assemblages, both driven by...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ecological interactions; Physicochemical variables; Hydromorphology.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252009000300009

Distribution, habitat use and plant associations of Moluchia brevipennis (Saussure, 1864) (Blattodea: Ectobiidae): an endemic cockroach from Chilean Mediterranean Matorral biome
Provedor de dados: 92
Autores: Schapheer,Constanza; Lopez-Uribe,Margarita M.; Vera,Alejandro; Villagra,Cristian A.
ABSTRACT Wild cockroaches are often described as abundant and diverse insects from wet tropical zones; however, they can also be found in arid and semiarid areas. It is proposed that in these drier environments cockroach survival may dependent on its tight association with native plant species. In this work, using bait trapping and active collection methods, we surveyed cockroach species along central Chile coastal scrubland; the southern limit of the semiarid Mediterranean Matorral biome in the Neotropical Region (32° S). Based on morphological and DNA barcoding methods we found that our collected cockroaches belonged to native species Moluchia brevipennis (Saussure, 1864) (Blattodea: Ectobiidae). Furthermore, thanks to field sampling, we noticed for the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Larcenists; Habitat fragmentation; Ecological interactions; South American cockroaches.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262017000200114

Composition of mixed-species bird flocks in forest fragments of southern Brazil
Provedor de dados: 103
Autores: Brandt,Cláudia S.; Hasenack,Heinrich; Laps,Rudi R.; Hartz,Sandra Maria.
The present study aimed to evaluate the composition of mixed-species bird flocks in a fragmented landscape of the Atlantic Forest in southern Brazil. We recorded 117 species in 218 mixed-species flocks. The correspondence analysis showed two distinct groups of fragments according to degree of connectivity with other fragments. The percentage of original cover surrounding a sampled fragment area up to a ratio of 2.5 and 1 km was the variable that presented highest correlation with the formation of different composition of mixed-species bird flocks, followed by altitude. Based on these results, we concluded that, in landscapes with low levels of fragmentation, the composition of mixed flocks reflects the local species pool. Thus, future studies comparing...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Atlantic Forest; Bird community; Ecological interactions; Fragmentation; Mixed-species flocks.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702009000300013

Bidimensional transfer of effects among organisms: An overlooked concept in community ecology
Provedor de dados: 97
Autores: RAMOS-JILIBERTO,RODRIGO; ARÁNGUIZ-ACUÑA,ADRIANA.
Although geneticists and population ecologist have considered in their explanations the importance of both horizontal -interspecific- and vertical -intraspecific- paths for the flow of information, energy or matter among organisms, community ecology and particularly network ecology have been strongly biased towards considering only horizontal effects. In this article our aim is to put on view of ecologists the concepts of vertical and horizontal transfer of disturbance effects in communities, and discuss the relevance of the interplay between both processes for ecological research. We support that incorporating this view into community ecology could be a promising new research avenue, and may improve our understanding about the responses of communities to...
Tipo: Journal article
Palavras-chave: Ecological networks; Ecological interactions; Food webs; Horizontal effects; Vertical effects.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2013000100002