1,721,736 research outputs found
Figure 3 in Microhabitat diversity of Svalbard Bryozoa
No full textFigure 3. Accumulation curve for assemblages on major microhabitats.Published as part of Kukliński, Piotr & Barnes, David K. A., 2005, Microhabitat diversity of Svalbard Bryozoa, pp. 539-554 in Journal of Natural History 39 (7) on page 543, DOI: 10.1080/00222930400001350, http://zenodo.org/record/522153
Figure 5. Top 10 in Microhabitat diversity of Svalbard Bryozoa
No full textFigure 5. Top 10 most abundantPublished as part of Kukliński, Piotr & Barnes, David K. A., 2005, Microhabitat diversity of Svalbard Bryozoa, pp. 539-554 in Journal of Natural History 39 (7) on page 549, DOI: 10.1080/00222930400001350, http://zenodo.org/record/522153
Figure 1 in Microhabitat diversity of Svalbard Bryozoa
No full textFigure 1. The position of study sites at Svalbard Archipelago. Framed main study site—Kongsfjorden; W, Wijdefjorden; D, Duvefjorden; T, Tommeloyane; H, Helleysundet; B, Boltodden; Ho, Hornsund; Be, Bellsund.Published as part of Kukliński, Piotr & Barnes, David K. A., 2005, Microhabitat diversity of Svalbard Bryozoa, pp. 539-554 in Journal of Natural History 39 (7) on page 541, DOI: 10.1080/00222930400001350, http://zenodo.org/record/522153
Figure 4 in Microhabitat diversity of Svalbard Bryozoa
No full textFigure 4. Cluster analyses based on frequency of occurrence data. S, stones; M, Mollusca; A, algae; B, Bryozoa; in brackets, number of individuals or pieces investigated.Published as part of Kukliński, Piotr & Barnes, David K. A., 2005, Microhabitat diversity of Svalbard Bryozoa, pp. 539-554 in Journal of Natural History 39 (7) on page 547, DOI: 10.1080/00222930400001350, http://zenodo.org/record/522153
Figure 3 in Microhabitat diversity of Svalbard Bryozoa
No full textFigure 3. Accumulation curve for assemblages on major microhabitats.Published as part of Kukliński, Piotr & Barnes, David K. A., 2005, Microhabitat diversity of Svalbard Bryozoa, pp. 539-554 in Journal of Natural History 39 (7) on page 543, DOI: 10.1080/00222930400001350, http://zenodo.org/record/522153
Likely responses of the Antarctic benthos to climate-related changes in physical disturbance during the 21st century, based primarily on evidence from the West Antarctic Peninsula region
No full textDisturbance has always shaped the evolution and ecology of organisms and nowhere is this more apparent that on the iceberg gouged continental shelves of the Antarctic Peninsula (AP). The vast majority of currently described polar biodiversity occurs on the Southern Ocean shelf but current and projected climate change is rapidly altering disturbance intensities in some regions. The AP is now amongst the fastest warming and changing regions on earth. Seasonal sea ice has decreased in time and extent, most glaciers in the region have retreated, a number of ice shelves have collapsed, and the surface waters of the seas west of the AP have warmed. Here, we review the influences of disturbance from ice, sedimentation, freshening events, wave action and humans on shallow water benthic assemblages, and suggest how disturbance pressures will change during the 21st century in the West Antarctic Peninsula (WAP) and Scotia Arc region. We suggest that the intensity of ice scouring will increase in the region over the next few decades as a result of decreased winter sea ice periods and increased ice loading into coastal waters. Thus, the most frequently disturbed environment on earth will become more so, which will lead to considerable changes in community structure and species distributions. However, as ice fronts retreat past their respective grounding lines, sedimentation and freshening events will become relatively more important. Human presence in the region is increasing, through research, tourism, and resource exploitation, which represents a considerable threat to polar biodiversity over the next century. Adapting to or tolerating multiple, changing environmental stressors will be difficult for a fauna with typically slow generation turnovers that has evolved largely in isolation. We suggest that intensifying acute and chronic disturbances are likely to cause significant changes in ecosystem structure, and probably a considerable loss of polar marine biodiversity, over relatively short timescales
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
An introduction to algebraic models for rational G-spectra
No full textThe project of Greenlees et al. on understanding rational G-spectra in terms of algebraic categories has had many successes, classifying rational G-spectra for finite groups, SO(2), O(2), SO(3), free and cofree G-spectra as well as rational toral G-spectra for arbitrary compact Lie groups.This paper provides an introduction to the subject in two parts. The first discusses rational G-Mackey functors, the action of the Burnside ring and change of group functors. It gives a complete proof of the well-known classification of rational Mackey functors for finite G. The second part discusses the methods and tools from equivariant stable homotopy theory needed to obtain algebraic models for rational G-spectra. It gives a summary of the key steps in the classification of rational G-spectrain terms of a symmetric monoidal algebraic category.Having these two parts in the same place allows one to clearly see the analogy between the algebraic and topological classifications
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