Gentry Revisited: The Agaves of the Peninsula of Baja California, México

Webb, Robert H.; Starr, Greg

doi:10.2985/026.020.0101

Cited by 10 publications

(69 citation statements)

References 12 publications

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“…The presence of winter-blooming agaves in the southern peninsula has been suggested as a food resource for lesser long-nosed bats that overwinter in the Cape region of Baja ( Fleming et al 1993 ). While there are 22 species of agave that occur on the Baja peninsula, only 3 species are found in the southern peninsular Cape region ( Webb and Starr 2015 ). Two of these species typically bloom in the spring months from roughly February to April and the other has a typical autumn bloom period from September to December ( Rebman and Roberts 2012 ).…”

Section: Discussionmentioning

confidence: 99%

“…Habitats near southern roosts had high densities of columnar cacti dominated by the same spring- and summer-blooming species ( P. pringlei and S. thurberi ) but also contained the cardón-barbón columnar cactus ( P. pecten-aboriginum , Cactaceae) that blooms November–February. Agave species occurred in all ecoregions where bat roosts were located but at lower densities and with less predictable flowering phenologies ( Rebman and Roberts 2012 ; Webb and Starr 2015 ).…”

Section: Methodsmentioning

confidence: 99%

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Seasonal ecology of a migratory nectar-feeding bat at the edge of its range

Frick

Heady

Earl

et al. 2018

Journal of Mammalogy

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Migratory species that cross geopolitical boundaries pose challenges for conservation planning because threats may vary across a species’ range and multi-country collaboration is required to implement conservation action plans. The lesser long-nosed bat (Leptonycteris yerbabuenae) is a migratory pollinator bat that was removed from the Endangered Species List in the United States in 2018 and from threatened status in Mexico in 2013. The seasonal ecology and conservation status of the species is well understood in the core part of its range on mainland Mexico and in the southwestern United States, but relatively little is known about the species on the Baja California peninsula in northwestern Mexico, a part of its range range separated by the Gulf of California. We studied the seasonal ecology of lesser long-nosed bats on the Baja peninsula at 8 focal roosts along a 450-km north-to-south transect to test hypotheses about migratory or residential status of the species on the Baja peninsula. We provide evidence of an extensive population of lesser long-nosed bats on the Baja peninsula that is primarily seasonally migratory and includes 2 mating roosts with males on the southern part of the peninsula. Seasonal ecology of lesser long-nosed bats was closely associated with the flowering and fruiting season of the cardón (Pachycereus pringlei), the dominant columnar cactus on the peninsula. However, we discovered that some female lesser long-nosed bats arrive and give birth at southern roosts in mid-February, about 2 months earlier than other migratory populations in more northern Sonoran Desert habitats. We documented the loss of nearly a third of the known maternity roosts during the study, demonstrating that action to protect key roosts remains a high priority. Migratory pollinators are particularly vulnerable to climate and land-use changes and we recommend continued monitoring and research to guide effective range-wide conservation of the species.Las especies migratorias o con rangos de distribución amplios que incluyen fronteras geopolíticas, representan desafíos particulares para la planificación de estrategias de conservación, ya que las amenazas así como las tendencias poblacionales pueden variar a lo largo de su rango geográfico y se requiere la colaboración de múltiples países para implementar planes de acción que permitan su conservación. El murciélago magueyero menor (Leptonycteris yerbabuenae) es un murciélago polinizador migratorio que recientemente fue sacado de la lista de especies en peligro en los Estados Unidos en 2018 y en México en 2013. La ecología estacional y el estatus de conservación de esta especie, ha sido bien estudiado en el centro de su rango de distribución en México continental, pero se sabe muy poco acerca de la especie en la Península de Baja California en el noreste de México, región que está separada del resto del rango por el golfo de California. Nosotros estudiamos la ecología estacional del murciélago magueyero menor, en ocho cuevas a lo largo de un transecto de 450 km n...

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Seasonal ecology of a migratory nectar-feeding bat at the edge of its range

Frick

Heady

Earl

et al. 2018

Journal of Mammalogy

View full text Add to dashboard Cite

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“… Map of the southern Baja California Peninsula, Mexico, with a background representing the topography of the area and black dots representing 29 sample site locations of Agave aurea sensu Webb and Starr ( 2015 ). Sampling site abbreviations can be found in Table S1 ; the subspecies of A. aurea var.…”

Section: Introductionmentioning

confidence: 99%

“…Of the three varieties or subspecies sensu Webb and Starr ( 2015 ), A. aurea ssp. aurea is the most common and abundant, extending from the western slopes of the Sierra La Giganta to the Sierra La Laguna in the Cape Region.…”

Section: Introductionmentioning

confidence: 99%

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Population genomics and distribution modeling revealed the history and suggested a possible future of the endemic Agave aurea (Asparagaceae) complex in the Baja California Peninsula

Klimova,

Gutíerrez‐Rivera,

Ortega‐Rubio

et al. 2024

Ecology and Evolution

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Agaves are an outstanding arid‐adapted group of species that provide a unique chance to study the influence of multiple potential factors (i.e., geological and ecological) on plant population structure and diversification in the heterogeneous environment of the Baja California Peninsula. However, relatively little is known about the phylogeography of the endemic agave species of this region. Herein, we used over 10,000 single‐nucleotide polymorphisms (SNPs) and spatial data from the Agave aurea species complex (i.e., A. aurea ssp. aurea, A. aurea ssp. promontorii, and A. aurea var. capensis) to resolve genetic relationships within this complex and uncover fine‐scale population structure, diversity patterns, and their potential underlying drivers. Analyses resolved low genetic structure within this complex, suggesting that A. aurea is more likely to represent several closely related populations than separate species or varieties/subspecies. We found that geographical and historical ecological characteristics—including precipitation, latitude, and past climatic fluctuations—have played an important role in the spatial distribution of diversity and structure in A. aurea. Finally, species distribution modeling results suggested that climate change will become critical in the extinction risk of A. aurea, with the northernmost population being particularly vulnerable. The low population genetic structure found in A. aurea is consistent with agave's life history, and it is probably related to continuity of distribution, relatively low habitat fragmentation, and dispersion by pollinators. Together, these findings have important implications for management and conservation programs in agave, such as creating and evaluating protected areas and translocating and augmentation of particular populations.

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Agave AGAVACEAE

Thiede¹

2019

Monocotyledons

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Gentry Revisited: The Agaves of the Peninsula of Baja California, México

Cited by 10 publications

References 12 publications

Seasonal ecology of a migratory nectar-feeding bat at the edge of its range

Seasonal ecology of a migratory nectar-feeding bat at the edge of its range

Population genomics and distribution modeling revealed the history and suggested a possible future of the endemic Agave aurea (Asparagaceae) complex in the Baja California Peninsula

Agave AGAVACEAE

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