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Ecological influence of habitat structure on the diversity of fauna in Rivers State, Nigeria

100%
Abere S. A.
World News of Natural Sciences
|
2018
|
vol. 16
75-85
EN
Natural habitats are being degraded on a daily basis due to the increase in population and the need to put them to alternative use. This has cause a downturn in biodiversity. The habitat structure, however, plays a key role in species distribution and diversity, hence, the need for its protection. Animal species diversity has been reported to be dependent on the structure of the habitat. However, information on wildlife species in relation to habitat structure within Bonny Island forest has not been adequately documented. Therefore, wildlife diversity in Bonny Island was assessed. Herein, flora and fauna surveys were carried out on fixed transect lines using point centre quarter and line transect methods, respectively, in both the dry and wet seasons. Data were analyzed using descriptive statistics and correlation analysis. Abundance of trees, shrubs, grasses and aquatic plant species in BSS (24, 13, 10 and 8, respectively) were higher than in BIS (8, 10, 10 and 10). Anthropogenic activities: hunting, fishing and other agricultural practices exerted higher pressure of 20.0%, 60.0% and 10.0%, respectively on wildlife resources during the dry rather than the wet seasons (17.5%, 43.8% and 38.70%, respectively). Higher density index of avian, amphibian, reptiles and mammals were recorded in BSS (3.2, 3.3, 4.4 and 2.1, respectively) compared to BIS (0.2, 0.7, 0.5 and 0.6). Moreover, there were more catch values in the dry than in the wet seasons (t=0.935). In addition, a higher diversity index (t=2.18) was recorded in BSS than in BIS. Generally, more species diversity was observed in the BSS block than the BIS and this is attributed to the habitat structure which is more structurally complex and less fragmented.
2
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Co-evolution in context: The importance of studying gut microbiomes in wild animals

75%
Amato K. R.
Microbiome Science and Medicine
|
2013
|
vol. 1
|
issue 1
EN
Because the gut microbiota contributes to host nutrition, health and behavior, and gut microbial community composition differs according to host phylogeny, co-evolution is believed to have been an important mechanism in the formation of the host-gut microbe relationship. However, current research is not ideal for examining this theme. Most studies of the gut microbiota are performed in controlled settings, but gut microbial community composition is strongly influenced by environmental factors. To truly explore the co-evolution of host and microbe, it is necessary to have data describing host-microbe dynamics in natural environments with variation in factors such as climate, food availability, disease prevalence, and host behavior. In this review, I use current knowledge of host-gut microbe dynamics to explore the potential interactions between host and microbe in natural habitats. These interactions include the influence of host habitat on gut microbial community composition as well as the impacts of the gut microbiota on host fitness in a given habitat. Based on what we currently know, the potential connections between host habitat, the gut microbiota, and host fitness are great. Studies of wild animals will be an essential next step to test these connections and to advance our understanding of host-gut microbe co-evolution.
3
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Rove beetles (Coleoptera: Staphylinidae) in Central European apple and pear orchards - comparative studies of species richness, abundance and diversity

75%
Balog A., Markó V.
Journal of Plant Protection Research
|
2007
|
vol. 47
|
issue 3
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