The number of species recognized in Aulacorhynchus toucanets has varied tremendously over the past century. Revisors seem to disagree on whether head and bill coloration are useful indicators of species limits, especially in the A. “prasinus” complex. Using morphometrics,...

["Biodiversity","Taxonomy","Zoology"]
doi:10.7717/peerj.2381
1 download
89 views

The coral reefs around Praia do Tofo, southern Mozambique, are known for their aggregations of marine megafauna but as yet few studies have comprehensively examined their broader biodiversity. This study is the first to assess the ichthyofaunal diversity of this...

["Biodiversity","Conservation Biology","Marine Biology"]
doi:10.7287/peerj.preprints.2389v1
23 downloads
166 views

The ultrastructure of spermatozoa in three species of cambarid crayfish, Cambarus robustus, Orconectes propinquus, and Orconectes rusticus, were studied and compared with eight previously studied species from different crayfish families using morphological features...

["Biodiversity","Zoology"]
doi:10.7717/peerj.2363
6 downloads
89 views

Urban habitats are characterized by a number of unique environmental variables, including modified vegetative structure, fragmentation, small patch size, invasive species, and higher levels of anthropogenic noise. Many songbird species are found less frequently...

["Animal Behavior","Biodiversity","Ecology","Coupled Natural and Human Systems"]
doi:10.7287/peerj.preprints.2387v1
54 downloads
229 views

Biodiversity-ecosystem function (BEF) experiments routinely employ common garden designs, drawing samples from a local biota. The communities from which taxa are sampled may not, however, be at equilibrium. To test for temporal changes in BEF relationships, I assembled...

["Biodiversity","Ecology","Ecosystem Science","Environmental Sciences","Microbiology"]
doi:10.7287/peerj.preprints.1897v2
46 downloads
288 views

In the midst of the current biodiversity crisis, conservation efforts might profitably be directed towards ensuring that extinctions do not result in inordinate losses of evolutionary history. Numerous methods have been developed to evaluate the importance of species...

["Biodiversity","Conservation Biology","Evolutionary Studies"]
doi:10.7717/peerj.2350
40 downloads
249 views

Small mammals play important roles in many ecosystems, and understanding their response to disturbances such as cattle grazing is fundamental for developing sustainable land use strategies. However, how small mammals respond to cattle grazing remains controversial....

["Biodiversity","Conservation Biology","Ecology"]
doi:10.7717/peerj.2349
70 downloads
333 views

Comparisons between biodiversity and other complex systems can facilitate cross-disciplinary exchange of theories and the identification of key system processes and constraints. For example, due to qualitative structural and functional analogies to biological systems,...

["Biodiversity","Computational Science"]
doi:10.7287/peerj.preprints.2367v2
117 downloads
174 views

Aim: Barriers continue to be built globally despite their well-known negative effects on freshwater ecosystems. Fish habitats are disturbed by barriers and the connectivity in the stream network reduced. We implemented and assessed the use of barrier data, including...

["Aquaculture, Fisheries and Fish Science","Biodiversity","Ecology","Environmental Sciences"]
doi:10.7287/peerj.preprints.2112v2
369 downloads
1,027 views

Background The Hajar Mountains of Oman and the United Arab Emirates (UAE) is the highest mountain range in Eastern Arabia. As a result of their old geological origin, geographical isolation, complex topography and local climate, these mountains provide an important...

["Biodiversity","Biogeography","Evolutionary Studies","Taxonomy","Zoology"]
doi:10.7717/peerj.2371
53 downloads
374 views

Background Global demand for food has led to increased land-use change, particularly in dry land ecosystems, which has caused several environmental problems due to the soil degradation. In the Cuatro Cienegas Basin (CCB), alfalfa production irrigated by flooding...

["Biodiversity","Ecology","Ecosystem Science","Soil Science"]
doi:10.7717/peerj.2365
68 downloads
417 views

The vertebrate fauna of the Philippines, known for its diversity and high proportion of endemic species, comprises mainly small- to medium-sized forms with a few large exceptions. As with other tropical ecosystems, the major threats to wildlife are habitat loss,...

["Biodiversity","Conservation Biology","Ecology"]
doi:10.7717/peerj.2288
65 downloads
314 views

Knowledge of the effect of habitat type and region on diet and feeding behaviours of a species facilitates a better understanding of factors impacting populations, which contributes to effective conservation management. Using spraint analysis and relative frequency...

["Animal Behavior","Biodiversity","Biogeography","Conservation Biology","Zoology"]
doi:10.7717/peerj.2266
14 downloads
112 views

Background. Organism biomass is one of the most important variables in ecological studies, making estimations of organism weight one of the most common laboratory tasks. Biomass of small macroinvertebrates is usually estimated as dry (DW) or ash-free dry weight...

["Aquaculture, Fisheries and Fish Science","Biodiversity","Ecology","Marine Biology","Zoology"]
doi:10.7287/peerj.preprints.2368v1
15 downloads
72 views

Background. Now-a-day territory of Western Siberia has the poorest diversity of amphibians and reptiles within the Palaearctic Realm, influenced by unfavourable climate. Less is known about the origin and emergence of it. Aside from better-explored European Neogene...

["Biodiversity","Biogeography","Paleontology","Taxonomy","Zoology"]
doi:10.7287/peerj.preprints.2365v1

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