Graph and download economic data for Resident Population in Nassau County, NY (NYNASS9POP) from 1970 to 2024 about Nassau County, NY; New York; NY; residents; population; and USA.

A dataset listing New York counties by population for 2024.

This layer visualizes the geographic distribution of the predominant higher education achievements of the population of Long Island, NY. The applicable population data from the US Census was used to enrich the available geographic features. The colors of the features reflect the predominant level of education and the transparency is based on the relative predominance.

A dataset listing New York cities by population for 2024.

Understanding population structure and areas of demographic persistence and transients is critical for effective species management. However, direct observational evidence to address the geographic scale and delineation of ephemeral or persistent populations for many marine fishes is limited. The Lined seahorse (Hippocampus erectus) can be commonly found in three western Atlantic zoogeographic provinces, though inhabitants of the temperate northern Virginia Province are often considered tropical vagrants that only arrive during warm seasons from the southern provinces and perish as temperatures decline. Although genetics can locate regions of historical population persistence and isolation, previous evidence of Virginia Province persistence is only provisional due to limited genetic sampling (i.e., mitochondrial DNA and five nuclear loci). To test alternative hypotheses of historical persistence versus the ephemerality of a northern Virginia Province population we used a RADseq generated dataset consisting of 11,708 single nucleotide polymorphisms (SNP) sampled from individuals collected from the eastern Gulf of Mexico to Long Island, NY. Concordant results from genomic analyses all infer three genetically divergent subpopulations, and strongly support Virginia Province inhabitants as a genetically diverged and a historically persistent ancestral gene pool. These results suggest that individuals that emerge in coastal areas during the warm season can be considered “local” and supports offshore migration during the colder months. This research demonstrates how a large number of genes sampled across a geographical range can capture the diversity of coalescent histories (across loci) while inferring population history. Moreover, these results clearly demonstrate the utility of population genomic data to infer peripheral subpopulation persistence in difficult-to-observe species.

In numerous clades, divergent sister species have largely non-overlapping geographic ranges. This pattern presumably arises because species diverged in allopatry or parapatry, prior to subsequent contact. Here we provide population-genomic evidence for the opposite scenario: previously sympatric ecotypes that have spatially separated into divergent monomorphic populations over large geographic scales (reverse sympatric scenario). We analyzed a North American salamander (Plethodon cinereus) with two color morphs that are broadly sympatric: striped (redback) and unstriped (leadback). Sympatric morphs can show considerable divergence in other traits, and many Plethodon species are fixed for a single morph. Long Island (New York) is unusual in having many pure redback and leadback populations that are spatially separated, with pure redback populations in the west and pure leadbacks in the east. Previous work showed that these pure-morph populations were genetically, morphologically, and ecologically divergent. Here, we performed a coalescent-based analysis of new data from 88,696 single-nucleotide polymorphisms to address the origins of these populations. This analysis strongly supports the monophyly of Long Island populations and their subsequent divergence into pure redback and pure leadback populations. Taken together, these results suggest that the formerly sympatric mainland morphs separated into parapatric populations on Long Island, reversing the conventional speciation scenario.

Anthropogenically driven environmental change has imposed substantial threats on biodiversity, including the emergence of infectious diseases that have resulted in declines of wildlife globally. In response to pathogen invasion, maintaining diversity within host populations across heterogenous environments is essential to facilitating species persistence. White-nose syndrome is an emerging fungal pathogen that has caused mass mortalities of hibernating bats across North America. However, in the Northeast, peripheral island populations of the Endangered northern myotis (Myotis septentrionalis) appear to be persisting despite infection while mainland populations in the core of the species range have experienced sharp declines. Thus, this study investigated host and environmental factors that may contribute to divergent population responses. We compared patterns of pathogen exposure and infection intensity between populations and documented the environmental conditions and host activity pa..., , , # The importance of peripheral populations in the face of novel environmental change

https://doi.org/10.5061/dryad.ffbg79d4n

Description of the data and file structure

We conducted a comparative study of northern myotis populations in the United States to explore the mechanisms that may be supporting species survival following the arrival of white-nose syndrome (WNS). Here, the core of the species range is represented by mainland populations and the periphery is represented by the coastal island populations of Long Island, New York, and Martha’s Vineyard and Nantucket, Massachusetts. First, we presented mainland colony declines from hibernacula across the species range and we compared capture probabilities of island and mainland bats to assess the severity of population decline in post-WNS years. We quantified seasonal patterns of Pseudogymnoascus destructans prevalence and infection intensity between the islands and mainland. We compar...

Numbers of Sandplain Gerardia on Long Island increased to approximately 14,000 plants in 2001. In the five year period 1997-2001 numbers of plants have increased more than seven-fold. This success is due to several ongoing actions: management to maintain native grassland habitat suitable for Sandplain Gerardia, fencing to prevent browse damage due to rabbits, and moving seeds to new unoccupied locations at both existing and new population sites.

Raw qPCR data evaluating gene silencing in southern pine beekle, Dendroctonus frontalis, collected from two gepgrahically distinct locations: Long Island, NY and Cañadas de Nanchititla, State of Mexico.

A dataset listing the richest zip codes in New York per the most current US Census data, including information on rank and average income.