Results 11 to 20 of about 41,806 (268)

Finding even subgraphs even faster [PDF]

open access: yesJournal of Computer and System Sciences, 2018
Problems of the following kind have been the focus of much recent research in the realm of parameterized complexity: Given an input graph (digraph) on $n$ vertices and a positive integer parameter $k$, find if there exist $k$ edges (arcs) whose deletion results in a graph that satisfies some specified parity constraints.
Prachi Goyal   +4 more
openaire   +9 more sources

Recognizing even-cycle and even-cut matroids [PDF]

open access: yesMathematical Programming, 2020
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Bertrand Guenin, Cheolwon Heo
openaire   +1 more source

Cross-biome comparison of microbial association networks

open access: yesFrontiers in Microbiology, 2015
Clinical and environmental meta-omics studies are accumulating an ever-growing amount of microbial abundance data over a wide range of ecosystems. With a sufficiently large sample number, these microbial communities can be explored by constructing and ...
Karoline eFaust   +16 more
doaj   +1 more source

Perception and appreciation of plant biodiversity among experts and laypeople

open access: yesPeople and Nature, 2023
Plant biodiversity, which is fundamental for the delivery of ecosystem services, is in decline. Yet, knowledge about how plant biodiversity is perceived and appreciated is scarce.
Eva Breitschopf, Kari Anne Bråthen
doaj   +1 more source

Effect of forest structure changes on permutation and diversity of corticolous lichens (case study: Kheiroud forest, Nowshahr) [PDF]

open access: yesتحقیقات جنگل و صنوبر ایران, 2013
Although quite a few studies have been done in respect to forest structure and development in Iran, there is no study dealing with the evolution of lichens at different stages of forest development.
Majid Eshagh Nimvari, Asadollah Mattaji
doaj   +1 more source

Investigation on litter invertebrates diversity at natural forests and reforestations of hardwood and softwood in Mazandaran(Case study: Darabkola) [PDF]

open access: yesتحقیقات جنگل و صنوبر ایران, 2012
The most important role of the litter invertebrates is leaf litter decomposition and helping of nutrient elements cycling. The objective of this study was to evaluate litter invertebrates dversity within 20 years old plantations of alder (Alnus ...
Shirzad Mohammadnezhad Kiasari   +3 more
doaj   +1 more source

IDENTIFICATION OF THE MOLUCCAN MEGAPODE (Eulipoa wallacei) NATURAL HABITAT IN HARUKU ISLAND, INDONESIA AND ITS VEGETATION COMPOSITION

open access: yesBiotropia: The Southeast Asian Journal of Tropical Biology, 2023
The characteristics of island vegetation greatly influence the activities of endemic birds in island areas, such as the Moluccan endemic megapodes (Eulipoa wallacei) on Haruku Island.
Handy Erwin Pier Leimena   +2 more
doaj   +1 more source

Nonnegative Matrix Factorization With Data-Guided Constraints For Hyperspectral Unmixing

open access: yesRemote Sensing, 2017
Hyperspectral unmixing aims to estimate a set of endmembers and corresponding abundances in pixels. Nonnegative matrix factorization (NMF) and its extensions with various constraints have been widely applied to hyperspectral unmixing.
Risheng Huang, Xiaorun Li, Liaoying Zhao
doaj   +1 more source

Niche partitioning and the storage effect facilitate coexistence in an amphibian community

open access: yesEcology and Evolution, 2023
Virtually all natural community assemblages are dominated by a handful of common species. Dominant species can exert negative impacts on biodiversity through competitive exclusion, and thus there is a strong incentive to understand imbalances in ...
George C. Brooks   +3 more
doaj   +1 more source

Species Diversity Induces Idiosyncratic Effects on Litter Decomposition in a Degraded Meadow Steppe

open access: yesFrontiers in Environmental Science, 2021
Litter decomposition is a fundamental path for nutrient cycling in a natural ecosystem. However, it remains unclear how species diversity, including richness and evenness, affects the decomposition dynamics in the context of grassland degradation.
Iqra Naeem   +8 more
doaj   +1 more source

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