Tìm thấy 11+ kết quả cho từ khóa "Community structure"
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Variation of phytoplankton community structure in Quang Ngai coastal waters during 2015–2019. Seasonal and annual changes in the phytoplankton community structure in Quang Ngai waters during the period 2015 to 2019 were analyzed to assess the phytoplankton diversity and reveal possible causes of these changes.
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Assessment of the zooplankton community structure of the coastal Uzungöl Lagoon (Kızılırmak Delta, Turkey) based on community indices and physicochemical. Moreover, coastal lagoons are among the most vulnerable aquatic ecosystems to current and foreseen climate changes as they are ecotone ecosystems which are open and connected with both freshwater and marine ones (Lloret et al., 2008)..
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Margalef index (D) of soil fauna community at different sampling sites.. Response of Carex cinerascens populations to groundwater level gradients in the Poyang Lake wetland. How tree diversity affects soil fauna diversity: a review. Relationship between soil fauna in wetland and wetland restoration. The characteristics of soil fauna community structure and its seasonal variations of typical wetlands in Sanjiang Plain, China.
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The nematode abundance, composition and biological indices Margalef richness , Shannon-Wiener diversity, Hill indices and Pielou’s (J) evenness were used as univariate measures of the community structure using PRIMER VI software. The densities of the nematode communities were rather different among stations in the two estuaries Ham Luong and Cung Hau.
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Detecting such community structures can be viewed as partitioning of the network into clusters in which the nodes are more densely connected to each other than to the nodes in the rest of the network. Modularity maximization [19] is one of the state-of-the-art methods for community detection.. It aims at discovering the partition of the network that maximizes modularity, a well-known quality measure of network community structure..
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Short-Term Change in Community Structure II. Successional Change in Community Structure. COMMUNITY STRUCTURE CHANGES THROUGH TIME AS SPECIES abundances change, altering the network of interactions. Short-term (e.g., sea- sonal or annual) changes in community structure represent responses to envi- ronmental changes that favor some species or affect interaction strength (see Chapter 8).
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The search for the understanding of ecological processes that determine species distribution patterns, tree community structure, and dynamics is one of the main challenges in plant ecology (Tilman et al., 1997. Begon et al., 2007. On the small scale, heterogeneity in soil and habitat conditions is an important driver of plant community structure (Baldeck et al., 2012).
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Also, the inclusion of a spatial variable in the PERMANOVA models indicated a loss of significance of site effect only for bug community structure measured by percentage of feeding groups. Changes in habitat structure are major drivers of animal responses to fire, as occurs worldwide in regions where fire is a major and common disturbance (e.g., Briani et al., 2004. Parr et al., 2004. Lindenmayer et al., 2008;. Deák et al., 2014).
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Chapter 10 addresses changes in community structure over time, especially community responses to environmental change. These community characteristics determine spatial and temporal patterns of energy and nutrient storage and flux through ecosystems.. Section IV (Chapters 11–15) focuses on ecosystems and is the unique contri- bution of this text to graduate education in insect ecology.
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Modularity and community structure in networks. Finding and evaluating community structure in networks. In KDD ’02: Proceedings of the eighth ACM SIGKDD international conference on Knowledge discovery and data mining, pages 81–90, New York, NY, USA, 2002. In KDD ’09: Proceeding of the 15th ACM SIGKDD international confer- ence on Knowledge discovery and data mining, 2009.. In SDM workshop on Analysis of Dynamic Networks, 2009..
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Disturbance history, or stage of postdisturbance recovery, also affects community structure (e.g., Harding et al. 1998, Schowalter et al. A number of studies have indicated global patterns in community structure related to latitudinal gradients in tem- perature and moisture and to the ecological history of adaptive radiation of par- ticular taxa..
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However, little attention has been paid to the structure of the soil fauna community in the ecosystem of tailings pools after revegetation.
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As several issues remained contentious, more dialogs in the community were needed and there was a high possibility that a uni- form structure of mangrove management for all villages would not be able to address the diversity. Internal Factors In fl uencing the Set-up of a CBI for Mangrove Management. The qualitative cum action research unveiled two kinds of internal factors that in fl uence the probabilities of a CBI for mangrove management.
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Nearest neighbour approach seems to be advantageous in terms of saving time and cost for studying spatial structure of forest community.. "An analysis of spatial forest structure using neighbourhood-based variables.". "A permutation test of spatial randomness: application to nearest neighbour indices in forest stands.".
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The present study showed that the variation in community attributes during the year was affected by the extraordinary flood, a natural event that caused a modification in the structure of the macroinvertebrate community associated with E.. The extraordinary increase in the water level resulted in the submersion of E. azurea was in the senescent stage.
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This hierarchic structure 5 is a kind of norms and practice within the scientific community 6. The hierarchic structure of the scientific community is of also relative nature. For this reason, “under this optics the scientific community can be considered as sandwiched layers on basis of scientific reputations” (M.J.Mulkay, 1980).. Links based on institutions of the scientific community:. There exists the share of functions in all the scientific communities.
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However, after living through a vicious cycle for many years, recently small-scale farmers in the community have begun to cooperate and to help each other by forming a group or organization with an informal structure like small-scale farmers' community. A small-scale farmers' community enterprise is a collaborative agribusiness arranged as a pro fi t-making, informal organization without legal registration as a juristic person.
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Identify environmental problems in the community. Each group should construct a map of the island.. Each group should make a list of environmental issues that are important in the community (e.g.. How aware are community members of the links between the environment and their health and livelihoods?. What actions have been taken in the community to solve these problems?.
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Other arguments against a X at, VP-less, structure for VSO lan- guages comes from tests of the relative prominence of subjects and objects. This of course assumes that subject–object asymmetries are de W ned over tree structure (using, for example c-command) rather than over argument structure or functional structures as in HPSG, LFG, and RRG. If one does not accept that subject–object asymmet- ries are best expressed by c-command then the following arguments evaporate..
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According to the water resource management in the community studied, key success factors can be classi fi ed into four groups:. Every aspect of the problem has to be managed. This includes the development of a water storage structure according to the conditions of the society and geographical suitability until people in the community have suf fi cient control both in normal and crisis situa- tions.