Mastodawn

RE: https://mastodon.social/@sflorg/115938651966073726

The #Humboldt #marten (#Martes #caurina #humboldtensis) is a #subspecies of the #Pacificmarten that has been listed as #endangered by the US Fish and #WildlifeService since 2020. These endemic martens inhabit the redwood forest coastal regions of California and Oregon, where they form four populations. M. E. Martin et al. (2022) point oit that their #populationecology is still understudied, posing a challenge for #conservation measurements.
©text #StefanFWirth 2026

Ref
https://doi.org/10.1111/csp2.12809

Planetary Ecologist Oct 15

Overpopulation (Zoology 🦥)

Overpopulation or overabundance is a state in which the population of a species is larger than the carrying capacity of its environment. This may be caused by increased birth rates, lowered mortality rates, reduced predation or large scale migration, leading to an overabundant species and other animals in the ecosystem competing for ...

https://en.wikipedia.org/wiki/Overpopulation

#Overpopulation #Zoology #PopulationDensity #PopulationEcology #AllPagesNeedingCleanup

Overpopulation - Wikipedia

Planetary Ecologist Sep 29

Population ecology (Ecology 🏞️)

Population ecology is a field of ecology that deals with the dynamics of species populations and how these populations interact with the environment, such as birth and death rates, and by immigration and emigration. The discipline is important in conservation biology, especially in the development of population viability analysis which makes it possibl...

https://en.wikipedia.org/wiki/Population_ecology

#PopulationEcology #Ecology #Population #AppliedStatistics

Population ecology - Wikipedia

Dryad Aug 21, 2025

#ESEB2025 is in full swing. In celebration we're sharing just a few of the many open datasets published on Dryad through our partnership with the society. First is...

"Inheritance of color morphs in the meadow grasshopper" from researchers Mahendra Varma, Gabe Winter, Anne Ebeling, Angela Lehmann, Lilian Cabon, Octavio Palacios Gimenez, Nikhil Pratap & Holger Schielzeth

DATA: bit.ly/4mkl5mI
ARTICLE: bit.ly/45YQEg2

#evolutionarybiology #populationecology #ecology #biology #openaccess #opendata

Planetary Ecologist Apr 25, 2025

Relative species abundance (Biodiversity 🦗)

Relative species abundance is a component of biodiversity and is a measure of how common or rare a species is relative to other species in a defined location or community. Relative abundance is the percent composition of an organism of a particular kind relative to the total number of organisms in the area. Rel...

https://en.wikipedia.org/wiki/Relative_species_abundance

#RelativeSpeciesAbundance #Biodiversity #PopulationEcology #EnvironmentalScience

Relative species abundance - Wikipedia

Planetary Ecologist Mar 10, 2025

Microbial population biology (Evolutionary biology 🧬)

Microbial population biology is the application of the principles of population biology to microorganisms.

https://en.wikipedia.org/wiki/Microbial_population_biology

#MicrobialPopulationBiology #PopulationEcology #EvolutionaryBiology #EnvironmentalMicrobiology

Microbial population biology - Wikipedia

Planetary Ecologist Dec 31, 2024

Wolf distribution (Biogeography 🌍)

Wolf distribution is the species distribution of the wolf. Originally, wolves occurred in Eurasia above the 12th parallel north and in North America above the 15th parallel north. However, deliberate human persecution has reduced the species' range to about one-third, because of livestock predation and fear of wol...

https://en.wikipedia.org/wiki/Wolf_distribution

#WolfDistribution #Wolves #Biogeography #AnimalMigration #PopulationEcology #PopulationGenetics

Wolf distribution - Wikipedia

Planetary Ecologist Dec 18, 2024

Reindeer distribution (Biogeography 🌍)

The reindeer is a widespread and numerous species in the northern Holarctic, being present in both tundra and taiga. Originally, the reindeer was found in Scandinavia, eastern Europe, Russia, Mongolia, and northern China north of the 50th latitude. In North America, it was found in Canada, Alaska, an...

https://en.wikipedia.org/wiki/Reindeer_distribution

#ReindeerDistribution #Reindeer #Biogeography #AnimalMigration #PopulationEcology #PopulationGenetics

Reindeer distribution - Wikipedia

Kenneth De Baets Jul 8, 2024

Morphology and vocalization comparison of the Houston Toad and the Dwarf American Toad: implications for their historic range: https://peerj.com/articles/17635/ via @PeerJLife #biodiversity #conservation #ecology #zoology #PopulationEcology #toads #amphibians

Morphology and vocalization comparison of the Houston Toad and the Dwarf American Toad: implications for their historic range

Documenting changes in the distribution and abundance of a given taxon requires historical data. In the absence of long-term monitoring data collected throughout the range of a taxon, conservation biologists often rely on preserved museum specimens to determine the past or present, putative geographic distribution. Distributional data for the Houston Toad (Anaxyrus houstonensis) has consistently been confounded by similarities with a sympatric congener, the Dwarf American Toad (A. americanus charlesmithi), both in monitoring data derived from chorusing surveys, and in historical data via museum specimens. In this case, misidentification can have unintended impacts on conservation efforts, where the Houston Toad is federally endangered, and the Dwarf American Toad is of least concern. Previously published reports have compared these two taxon on the basis of their male advertisement call and morphological appearance, often with the goal of using these characters to substantiate their taxonomic status prior to the advent of DNA sequencing technology. However, numerous studies report findings that contradict one another, and no consensus on the true differences or similarities can be drawn. Here, we use contemporary recordings of wild populations of each taxon to test for quantifiable differences in male advertisement call. Additionally, we quantitatively examine a subset of vouchered museum specimens representing each taxon to test previously reported differentiating morphometric characters used to distinguish among other Bufonids of East-Central Texas, USA. Finally, we assemble and qualitatively evaluate a database of photographs representing catalogued museum vouchers for each taxon to determine if their previously documented historic ranges may be larger than are currently accepted. Our findings reveal quantifiable differences between two allopatric congeners with respect to their male advertisement call, whereas we found similarities among their detailed morphology. Additionally, we report on the existence of additional, historically overlooked, museum records for the Houston Toad in the context of its putative historic range, and discuss errors associated with the curation of these specimens whose identity and nomenclature have not been consistent through time. These results bookend decades of disagreement regarding the morphology, voice, and historic distribution of these taxa, and alert practitioners of conservation efforts for the Houston Toad to previously unreported locations of occurrence.

PeerJ

Planetary Ecologist Jun 29, 2024

Random generalized Lotka–Volterra model (Ecology 🏞️)

The random generalized Lotka–Volterra model is an ecological model and random set of coupled ordinary differential equations where the parameters of the generalized Lotka–Volterra equation are sampled from a probability distribution, analogously to quenched ...

https://en.wikipedia.org/wiki/Random_generalized_Lotka–Volterra_model

#RandomGeneralizedLotkaVolterraModel #Ecology #Biophysics #CommunityEcology #DynamicalSystems #PopulationEcology