نتایج جستجو برای: taxonomic survey

تعداد نتایج: 398962  

2017
Paula Nilda Fergnani Adriana Ruggiero

The latitudinal diversity gradient has been considered a consequence of a shift in the impact of abiotic and biotic factors that limit species distributions from the poles to the equator, thus influencing species richness variation. It has also been considered the outcome of evolutionary processes that vary over geographical space. We used six South American mammal groups to test the associatio...

Journal: :Conservation biology : the journal of the Society for Conservation Biology 2014
Sanne Boessenkool Gayle McGlynn Laura S Epp David Taylor Manuel Pimentel Abel Gizaw Sileshi Nemomissa Christian Brochmann Magnus Popp

Conservation of biodiversity may in the future increasingly depend upon the availability of scientific information to set suitable restoration targets. In traditional paleoecology, sediment-based pollen provides a means to define preanthropogenic impact conditions, but problems in establishing the exact provenance and ecologically meaningful levels of taxonomic resolution of the evidence are li...

Journal: :Anais da Academia Brasileira de Ciencias 2015
Jonas E Gallão Maria Elina Bichuette

Subterranean environments, even though they do not possess a primary production (photosynthesis), may present high biodiversity, faunistic originality, endemism, phylogenetic isolations and unique ecological and/or evolution events, in addition to rare taxa. Studies investigating the biological diversity in Neotropical caves are relatively rare and recent, and most of them have been conducted i...

2003
J. W. van Sambeek

This document or any other document produced within the SUSTELNET project does not represent the opinion of the European Commission. Neither the European Commission, nor any person acting on behalf of the Commission, is responsible for the use that might be made of the information arising from the SUSTELNET project. Abstract This report identifies the main factors at play with regard to the int...

2015
Hirobumi Akagi Masahisa Fujita Hiroshi Goto Mitsuo Inada Ryo Ito Shinichiro Iwata Tatsuaki Kuroda Miwa Matsuo Tomoya Mori Atushi Nakajima Kentaro Nakajima Makoto Ogawa Takashi Unayama Isamu Yamauchi

This study empirically investigates whether agglomeration discourages married couples' fertility decisions. Exploiting Japanese social survey data to control for economic and social factors underlying fertility, it examines whether agglomeration affects completed fertility and the timing of childbirth. Results indicate that agglomeration impedes completed fertility. In addition, this study find...

2013
Carole C Baldwin

Ichthyologists, natural-history artists, and tropical-fish aquarists have described, illustrated, or photographed colour patterns in adult marine fishes for centuries, but colour patterns in marine fish larvae have largely been neglected. Yet the pelagic larval stages of many marine fishes exhibit subtle to striking, ephemeral patterns of chromatophores that warrant investigation into their pot...

2016
Thomas G Dahlgren Helena Wiklund Muriel Rabone Diva J Amon Chiho Ikebe Les Watling Craig R Smith Adrian G Glover

BACKGROUND We present data from a DNA taxonomy register of the abyssal Cnidaria collected as part of the Abyssal Baseline (ABYSSLINE) environmental survey cruise 'AB01' to the UK Seabed Resources Ltd (UKSRL) polymetallic-nodule exploration area 'UK-1' in the eastern Clarion-Clipperton Zone (CCZ), central Pacific Ocean abyssal plain. This is the second paper in a series to provide regional taxon...

2015
Dominique A. Cowart Miguel Pinheiro Olivier Mouchel Marion Maguer Jacques Grall Jacques Miné Sophie Arnaud-Haond

In the context of the sixth wave of extinction, reliable surveys of biodiversity are increasingly needed to infer the cause and consequences of species and community declines, identify early warning indicators of tipping points, and provide reliable impact assessments before engaging in activities with potential environmental hazards. DNA metabarcoding has emerged as having potential to provide...

2016
E.J. van Nieuwenhuijzen J.M. Miadlikowska J.A.M.P. Houbraken O.C.G. Adan F.M. Lutzoni R.A. Samson

A culture-based survey of staining fungi on oil-treated timber after outdoor exposure in Australia and the Netherlands uncovered new taxa in Pezizomycotina. Their taxonomic novelty was confirmed by phylogenetic analyses of multi-locus sequences (ITS, nrSSU, nrLSU, mitSSU, RPB1, RPB2, and EF-1α) using multiple reference data sets. These previously unknown taxa are recognised as part of a new ord...

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