Results 61 to 70 of about 54,970 (348)

Threatened bryophytes of the neotropical rain forest : a status report [PDF]

open access: yes, 1992
Tropical deforestation, inevitably, leads to the local loss of bryophyte species. Recent studies show that the degree of species loss may vary considerably and depends on the scale or amount of habitat change that has occurred.
Gradstein, Stephan Robbert
core  

Long‐term trends in parasite diversity and infection levels: approaches and patterns

open access: yesBiological Reviews, EarlyView.
ABSTRACT Parasites exist in every ecosystem, affecting nearly all organisms and playing a complex role in human societies. On the one hand, they contribute substantially to biodiversity and support ecosystem stability by performing essential ecological functions.
Cyril Hammoud   +8 more
wiley   +1 more source

Pulmonary development in Squamata: Insights from embryonic studies using micro‐CT

open access: yesDevelopmental Dynamics, EarlyView.
Abstract Background Pulmonary development in tetrapods is a complex process, especially within squamates, where single‐chambered, transitional, and multi‐chambered lungs can be found in adult animals. While the embryological development of the respiratory system of lizards and snakes was studied in a number of species between the 1830s and 1940s, the ...
Barbara G. Champini   +3 more
wiley   +1 more source

A first approach to chalcid wasps (Hymenoptera, Chalcididae) of the entomological museum UNAB with new records for Colombia

open access: yesAgronomía Colombiana, 2019
The entomological museum of Universidad Nacional, Faculty of Agricultural Sciences, Bogota, (UNAB) Colombia, conserves several arthropod collections. These collections are considered of great interest to several agricultural and silvicultural production ...
Alba Lucia Pérez-Benavides   +1 more
doaj   +1 more source

Range extension of Relicina subabstrusa (Parmeliaceae, lichenized Ascomycota) in Argentina and its distribution pattern in the Neotropics [PDF]

open access: yesCheck List, 2017
Relicina subabstrusa is known from a few scattered records in the Neotropics. This species lacks any propagules and has a black lower surface and coronate apothecia. This paper extends the known distributional range of R.
Andrea Michlig, Michel Navarro Benatti
doaj   +3 more sources

New bryophyte taxon records for tropical countries 1 [PDF]

open access: yes, 1997
This is the first in a series of papers listing new records, which will be published whenever sufficient new records have been found. The taxa are arranged by countries for an easier evaluation, e.g. updates of checklists. The initials of the contributor
Eggers, Jens   +4 more
core  

Patterns of understorey bird diversity across Amazonian forests: survey effort and range maps predict local species richness

open access: yesEcography, EarlyView.
Species diversity typically increases from higher to lower latitudes, but the regional‐scale variation along this geographic gradient remains unclear. It has been suggested that species diversity throughout Amazonia generally increases westward toward the Andes, but this pattern and its environmental determinants require further investigation for most ...
Pilar L. Maia‐ Braga   +14 more
wiley   +1 more source

Expanded description of Dolops bidentata (Bouvier, 1899) (Branchiura: Argulidae) based on specimens collected on Pygocentrus nattereri Kner, 1858 (Characiformes) from Poconé Wetland, MT, Brazil Descrição expandida de Dolops bidentata (Bouvier, 1899) (Branchiura: Argulidae) baseada em espécimes parasitos de Pygocentrus nattereri Kner, 1858 (Characiformes) do Pantanal de Poconé, MT, Brasil

open access: yesBrazilian Journal of Biology, 2011
The current information on the branchiuran Dolops bidentata, a species described more one hundred years ago, is valid but incomplete; hence, an expanded description is given herein.
AT. Silva-Souza   +4 more
doaj   +1 more source

Floristics of the South American Páramo moss flora [PDF]

open access: yes, 1990
The South American paramos appeared in Pliocene times and persist to the present day. The moss flora of this habitat consists of an estimated 400 species that comprise 8 floristic groups.
Griffin, Dana
core  

The scaling of seed‐dispersal specialization in interaction networks across levels of organization

open access: yesEcography, EarlyView.
Natural ecosystems are characterized by a specialization pattern where few species are common while many others are rare. In ecological networks involving biotic interactions, specialization operates as a continuum at individual, species, and community levels. Theory predicts that ecological and evolutionary factors can primarily explain specialization.
Gabriel M. Moulatlet   +3 more
wiley   +1 more source

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