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48635 research data, page 1 of 4864

Top-down control inhibits spatial self-organization of a patterned landscape

Regular, self-organized spatial patterns in primary producers have been described in a wide range of ecosystems and are predicted to affect community production and resilience. Although consumers are abundant in most systems, the effect of trophic interactions on pattern formation in primary producers remains unstudied. We studied the effects of top-down control by herbivores on a self-organized landscape of regularly spaced, diatom-covered hummocks alternating with water-filled hollows on an...

PEEK CFR-PEEK pin plate study dataset

Pin on plate studies to understand the influence of contact pressure, cross shear and counterface were undertaken with surface analysis measured prior to test and at completion. Mean wear factors for each condition were calculated at the completion of the study. This dataset includes the mean wear factor for each condition and the surface roughness measurements.

Measuring Pattern Diversity

Scheiner, Samuel M. (2016)
Publisher: Figshare
In this paper I develop a new viewpoint with regard to species diversity by defining a new type, pattern diversity, to add to the previous categories of inventory and differentiation diversity. By defining and naming this entity, we expand our notions of the properties of ecological units, can integrate it with other ecological concepts, and investigate it. Pattern diversity is a measure of the relative arrangement of subunits within an ecological unit, such as communities in a landscape. In ...

Two new diminutive species of Cnemaspis Strauch 1887 (Squamata: Gekkonidae) from Peninsular Malaysia

Grismer, Jesse L. (2009)
Publisher: Plazi.org taxonomic treatments database
This dataset contains the digitized treatments in Plazi based on the original journal article Grismer, Lee, Ahmad, Norhayati, Onn, Chan Kin, Belabut, Daicus, Wood, Perry L., Grismer, Jesse L. (2009): Two new diminutive species of Cnemaspis Strauch 1887 (Squamata: Gekkonidae) from Peninsular Malaysia. Zootaxa 2019: 40-56, DOI: 10.5281/zenodo.186045

A NULL MODEL FOR DETECTING NONRANDOM PATTERNS OF SPECIES RICHNESS ALONG SPATIAL GRADIENTS

Veech, Joseph A. (2016)
Publisher: Figshare
I present a null model that can be used for detecting nonrandom patterns of species richness along spatial gradients, such as latitude and elevation. Because estimates of species richness along a single spatial gradient are nonindependent, tests of statistical inference should not be applied. The null model described here circumvents this problem of nonindependence by randomly placing the actual range width of each species along the gradient. The simulated richness curve generated in this way...

Analysis Of Neighborhood Dynamics Of Forest Ecosystems Using Likelihood Methods And Modeling

Charles D. Canham; María Uriarte (2016)
Publisher: Figshare
Advances in computing power in the past 20 years have led to a proliferation of spatially explicit, individual-based models of population and ecosystem dynamics. In forest ecosystems, the individual-based models encapsulate an emerging theory of “neighborhood” dynamics, in which fine-scale spatial interactions regulate the demography of component tree species. The spatial distribution of component species, in turn, regulates spatial variation in a whole host of community and ecosystem propert...