Dataset Information

A new species of Encelia (Compositae, Heliantheae, Enceliinae) from the southern Baja California Peninsula.

ABSTRACT: Here, we describe and illustrate Enceliabalandra sp. nov., a new species of Compositae from the Baja California Peninsula. It is rare and known only from the rocky hills around Puerto Balandra and Pichilingüe, inside the bay of La Paz, in the State of Baja California Sur, Mexico. We determine that this new species has affinities with Encelia, based on its suffruticose woody habit, neuter ray florets and compressed disc cypselae with a cleft apex. The taxonomic placement within Encelia is supported by nuclear ribosomal sequence data from two regions, ITS and ETS. We also present detailed photographs, a conservation assessment and a dichotomous key to the Encelia of the southern Baja California Peninsula. Finally, we discuss the uniqueness of Enceliabalandra amongst peninsular Encelia and its potential significance for understanding the enigmatic biogeography of this ecologically important genus.

SUBMITTER: Leon-De La Luz JL

PROVIDER: S-EPMC9836472 | biostudies-literature | 2022

REPOSITORIES: biostudies-literature

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A new species of Encelia (Compositae, Heliantheae, Enceliinae) from the southern Baja California Peninsula.

Leon-De La Luz Jose Luis JL Lichter-Marck Isaac H IH

PhytoKeys 20221104

Here, we describe and illustrate Enceliabalandra sp. nov., a new species of Compositae from the Baja California Peninsula. It is rare and known only from the rocky hills around Puerto Balandra and Pichilingüe, inside the bay of La Paz, in the State of Baja California Sur, Mexico. We determine that this new species has affinities with Encelia, based on its suffruticose woody habit, neuter ray florets and compressed disc cypselae with a cleft apex. The taxonomic placement with ...[more]

PMID: 36763056

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Project description:Aims:The oases of Baja California Peninsula (BCP) have been proposed as important hotspots of biodiversity that hold an exceptional richness in the middle of desert conditions. We tested the effect of habitat and anthropogenic disturbance on communities of cavity-nesting taxa, with specific emphasis on bees, wasps, and their natural enemies. Methods:In oases of BCP and desert neighbor environments, trap-nesting taxa were evaluated in response to factors affecting the nest abundance, richness, and community structure. We used statistical models to find correlates of nest abundance and patterns of diversity, as well as ecological analyses to determine the effect of habitat and human disturbance on species diversity and community structure. Results:Solar irradiation, distance to a perennial waterbody and relative humidity influenced the presence of nests, number of brood cells, and parasitism. In general, abundance, species richness, and parasitism were higher in oases, especially in those with less human disturbance. Bees did not discriminate between oases and deserts to nest, whereas mud-daubing wasps were more dependent of oases. The degree of anthropogenic disturbance did not affect the occurrence of parasitism, but it had an adverse effect on the parasitism intensity (number of attacked cells). The community structure was more complex and even in oases and low-disturbed sites. The similarity between sites did not exceed 30%, and the proportion of shared species between oases and deserts varied from 2.7% to 26.6%. Main conclusions:The oases of Baja California are functioning as mesic islands in the desert, each oasis hosting a unique community of cavity-nesting taxa. About 65% of the nests and 50% of species occurred exclusively in the oasis. Thus, cavity-nesting species that depend on mesic conditions could be threatened if the oases of BCP disappear in the future. Local conditions in the oases and deserts of the BCP are shaping the community structure. However, large-scale factors such as climate can influence the seasonality and occurrence of species within the community of cavity-nesting dwellers. Since habitat loss and fragmentation can degrade the oases' functionality, strategies to maintain the ecosystem services of pollination and biological control should be included in the conservation programs of these fragile habitats.

Dataset Information

A new species of Encelia (Compositae, Heliantheae, Enceliinae) from the southern Baja California Peninsula.

Publications

A new species of <i>Encelia</i> (Compositae, Heliantheae, Enceliinae) from the southern Baja California Peninsula.

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Dataset Information

A new species of Encelia (Compositae, Heliantheae, Enceliinae) from the southern Baja California Peninsula.

Publications

﻿A new species of <i>Encelia</i> (Compositae, Heliantheae, Enceliinae) from the southern Baja California Peninsula.

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure

Tweets

A new species of <i>Encelia</i> (Compositae, Heliantheae, Enceliinae) from the southern Baja California Peninsula.