By Corrado Battisti, Gianluca Poeta, Giuliano Fanelli
This e-book represents an introductory evaluation of disturbance ecology and hazard research, supplying schematic recommendations and methods helpful for paintings on websites which are suffering from the impression of human activities. it truly is geared toward conservation and environmental practitioners, who will locate information for selecting tools and ways whilst there are conflicts among the traditional parts and human job. it's also addressed to scholars of utilized ecology, environment administration, land-use making plans and environmental influence evaluation. It discusses a couple of subject matters coated within the courses of many collage classes with regards to uncomplicated ecology and ecology of disturbance, the latter constituting a box of significant curiosity as a result of its implications and repercussions in utilized territorial technological know-how.
The e-book is split into elements: the 1st specializes in the theoretical and disciplinary framework of the ecology of disturbance, whereas the second one is dedicated to the research of anthropogenic threats. This, particularly, discusses the newest method, which makes use of a traditional nomenclature to permit a coarse-grained quantification and aim review of hazard effect on diversified environmental parts. Such an method enables the comparability of hierarchically varied occasions and, accordingly, is helping outline the priorities for administration and conservation strategies.
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Extra resources for An Introduction to Disturbance Ecology: A Road Map for Wildlife Management and Conservation
Although infrequent, these catastrophic events may exert a particular impact on biological communities, causing consequences in the long term. The effects of disturbances and the organisms’ responses may not increase linearly with the characteristics of the disturbance regimen (such as the extension, frequency, or duration of the event). , Romme et al. 1998) have distinguished three classes of responses: (i) continuous responses, where one can observe a linear relationship between the magnitude of the characteristics of the regime and the responses of the system; (ii) threshold responses, in which the responses are obvious only after exceeding a threshold value related to one of the characteristics; and (iii) independent responses, which are not related to changes in the values of the characteristics of the regime.
The extent (areal extent, spatial extent, or size): It corresponds to the size of the territory affected by the event (for example, disturbed surfaces and volumes calculated according to speciﬁc units of measurement). It can be calculated to the scale of a single environmental unit (or patch; for instance in the discrete disturbances like the gaps caused in a forest by tree falls) or to a greater scale (for example, to the landscape scale, as the extent of the grazing area for ungulates in a grassland).
Abundance-Biomass Comparisons (ABC). These curves represent a variation of the k-dominance plots and allow us to assess whether a community is impacted without comparing it to a not impacted ‘control’ community. With such diagrams a comparison can be made, within the same community, between the curves of cumulative relative frequency obtained from individual abundance values and the curves of cumulative relative frequency related to biomass data (individual body weight × total body weight). 3 1 10 cumulative frequency (log-transformed) Fig.