Results 21 to 30 of about 41,806 (268)

Mapping breeding birds in a re-naturalized historical fortress: composition, structure and considerations about abundance vs. biomass comparisons

open access: yesRivista Italiana di Ornitologia - Research in Ornithology, 2023
Using the mapping method, I obtained data about a rich, even and diversified breeding bird assemblage inhabiting an abandoned and re-naturalized historical military fortress (Rome, central Italy).
Corrado Battisti
doaj   +1 more source

The evenness illusion

open access: yesBasic and Applied Ecology
Evenness has become a routine companion to richness in ecological description, assessment and management. Yet most ecological assemblages are strongly uneven in species abundance and rarely approach equal representation among species.
Robert Warren, II
doaj   +1 more source

Changes in Richness and Species Composition after Five Years of Grazing Exclusion in an Endemic Pasture of Northern Mexico

open access: yesLand, 2022
A well-managed grazing system improves the productivity and health, and it is important to promote sustainability. We analyzed the impact of grazing on the Sierra de Zapalinamé protected area in north Mexico.
José Ramón Arévalo   +4 more
doaj   +1 more source

Even graphs [PDF]

open access: yesJournal of Graph Theory, 1986
AbstractA nontrivial connected graph G is called even if for each vertex v of G there is a unique vertex v such that d(v, v) = diam G. Special classes of even graphs are defined and compared to each other. In particular, an even graph G is called symmetric if d(u, v) + d(u, v) = diam G for all u, v ∈ V(G).
Gobel, F., Veldman, H.J.
openaire   +1 more source

Local and landscape environmental heterogeneity drive ant community structure in temperate seminatural upland grasslands

open access: yesEcology and Evolution, 2023
Environmental heterogeneity is an important driver of ecological communities. Here, we assessed the effects of local and landscape spatial environmental heterogeneity on ant community structure in temperate seminatural upland grasslands of Central ...
Antonio J. Pérez‐Sánchez   +4 more
doaj   +1 more source

Ovarian Sex Cord Stromal Tumors in Children and Adolescents—The European Standard Clinical Practice Recommendations

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT As part of the European Cooperative Study Group for Paediatric Rare Tumours initiative, we developed standard clinical practice guidelines for ovarian sex cord stromal tumors, based on comprehensive national and international cohort analyses, literature review, and a final expert consensus conference.
Dominik T. Schneider   +15 more
wiley   +1 more source

Diversity of Butterflies (Lepidoptera: Papilionoidea and Hesperioidea) of the South-Eastern Corner of Tsaghkunyats Mountain Ridge, Republic of Armenia [PDF]

open access: yesنامه انجمن حشره‌شناسی ایران
A study was conducted in the surroundings of Karenis village (South-Eastern corner of Tsaghkunyats Mountain Ridge) to document the composition of Papilionoidea and Hesperioidea species in the area.
Lilit Sargsyan, Noushig Zarikian
doaj   +1 more source

Dynamical symmetries in even-even Te nuclides

open access: yesPhysical Review C, 1987
The structure of the even-even Te nuclides with 114A134 is shown to consist of features that can be associated with underlying low-energy collective excitations, as well as particle-hole intruder and two-quasiparticle configurations. Energy level positions and branching ratios from new and existing measurements can be reasonably well fitted with a ...
Rikovska, J, Stone, N, Walters, W
openaire   +3 more sources

Bridging the Loneliness Gap: Depression, Connectivity, and Isolation in Pediatric Oncology Patients and Their Peers

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Background Loneliness is associated with adverse physical and mental health outcomes and remains understudied in children and adolescents undergoing cancer therapy. Pediatric oncology patients may be at increased risk due to medical isolation and disruption of social networks.
Charlotte N. Stahlfeld   +5 more
wiley   +1 more source

Central Nervous System Tumors Among Infants in Canada: A Report From CYP‐C

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Background Central nervous system (CNS) tumors in infants are rare, pose unique clinical challenges, and lack large‐scale evidence‐based data to guide management. This study seeks to describe CNS tumors in Canadian infants and to compare their outcomes with those of older children.
Samuel Sassine   +17 more
wiley   +1 more source

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