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Plagiotheciumtalbotii, a new species from the Aleutian Islands (Alaska, U.S.A.).

ABSTRACT: Plagiotheciumtalbotii sp. nov. is described from Attu Island, Alaska, U.S.A. The newly-described species is not similar in appearance to any Northern Hemisphere species; only the habit is similar to P.platyphyllum. However, it not only occupies a different habitat than that species, but genetically and morphologically, it is clearly distinct from it. The results of DNA sequencing, a detailed description of the morphological features, illustrations, ecological preferences and currently known geographical distribution of P.talbotii are presented. The most important distinguishing morphological features of this species are: the size of the plant; dimensions and symmetry of the leaves; dimensions of cells and their areolation; entire leaf apex; and long decurrencies with some inflated cells. Additionally, we propose to place P.talbotii in section Plagiothecium, which is confirmed by genetic analysis and morphological features.

SUBMITTER: Wolski GJ

PROVIDER: S-EPMC9033742 | biostudies-literature | 2022

REPOSITORIES: biostudies-literature

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Plagiotheciumtalbotii, a new species from the Aleutian Islands (Alaska, U.S.A.).

Wolski Grzegorz J GJ Nowicka-Krawczyk Paulina P Nowicka-Krawczyk Paulina P Buck William R WR

PhytoKeys 20220415

Plagiotheciumtalbotii sp. nov. is described from Attu Island, Alaska, U.S.A. The newly-described species is not similar in appearance to any Northern Hemisphere species; only the habit is similar to P.platyphyllum. However, it not only occupies a different habitat than that species, but genetically and morphologically, it is clearly distinct from it. The results of DNA sequencing, a detailed description of the morphological features, illustrations, ecological preferences and ...[more]

PMID: 35586326

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Project description:Sperm whales exhibit sexual dimorphism and sex-specific latitudinal segregation. Females and their young form social groups and are usually found in temperate and tropical latitudes, while males forage at higher latitudes. Historical whaling data and rare sightings of social groups in high latitude regions of the North Pacific, such as the Gulf of Alaska (GOA) and Bering Sea/Aleutian Islands (BSAI), suggest a more complex distribution than previously understood. Sperm whales are the most sighted and recorded cetacean in marine mammal surveys in these regions but capturing their demographic composition and habitat use has proven challenging. This study detects sperm whale presence using passive acoustic data from seven sites in the GOA and BSAI from 2010 to 2019. Differences in click characteristics between males and females (i.e., inter-click and inter-pulse interval) was used as a proxy for animal size/sex to derive time series of animal detections. Generalized additive models with generalized estimation equations demonstrate how spatiotemporal patterns differ between the sexes. Social groups were present at all recording sites with the largest relative proportion at two seamount sites in the GOA and an island site in the BSAI. We found that the seasonal patterns of presence varied for the sexes and between the sites. Male presence was highest in the summer and lowest in the winter, conversely, social group peak presence was in the winter for the BSAI and in the spring for the GOA region, with the lowest presence in the summer months. This study demonstrates that social groups are not restricted to lower latitudes and capture their present-day habitat use in the North Pacific. It highlights that sperm whale distribution is more complex than accounted for in management protocol and underscores the need for improved understanding of sperm whale demographic composition to better understand the impacts of increasing anthropogenic threats, particularly climate change.

Dataset Information

Plagiotheciumtalbotii, a new species from the Aleutian Islands (Alaska, U.S.A.).

Publications

<i>Plagiotheciumtalbotii</i>, a new species from the Aleutian Islands (Alaska, U.S.A.).

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Dataset Information

Plagiotheciumtalbotii, a new species from the Aleutian Islands (Alaska, U.S.A.).

Publications

﻿<i>Plagiotheciumtalbotii</i>, a new species from the Aleutian Islands (Alaska, U.S.A.).

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure

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<i>Plagiotheciumtalbotii</i>, a new species from the Aleutian Islands (Alaska, U.S.A.).