Community Ecology, Journal Year: 2023, Volume and Issue: 24(1), P. 61 - 72
Published: Jan. 16, 2023
Language: Английский
PLoS ONE, Journal Year: 2021, Volume and Issue: 16(5), P. e0251027 - e0251027
Published: May 6, 2021
Ecuador is one of the most biodiverse countries in world, but faces severe pressures and threats to its natural ecosystems. Numerous species have declined require be objectively evaluated quantified, as a step towards development conservation strategies. Herein, we present an updated National Red List Assessment for amphibian Ecuador, with detailed complete coverages any Ecuadorian taxonomic group date. Based on standardized methodologies that integrate work, spatial analyses, ecological niche modeling, assessed extinction risk identified main all native amphibians (635 species), using IUCN Categories Criteria. Our evaluation reveals 57% (363 species) are categorized Threatened, 12% (78 Near 4% (26 Data Deficient, 27% (168 Least Concern. assessment almost doubles number threatened comparison previous evaluations. In addition habitat loss, expansion agricultural/cattle raising frontier other anthropogenic (roads, human settlements, mining/oil activities) amplify incidence relevant predictors integrity. Potential synergic effects climate change emergent diseases (apparently responsible sudden declines), had particular importance amongst sustained by amphibians. Most distributed montane forests paramo habitats Andes, nearly 10% them occurring outside System Protected Areas government. our results, recommend following actions: (i) An increase include species. (ii) Supporting ex/in-situ programs protect considered like Critically Endangered Endangered. (iii) Focalizing research efforts description new species, well currently Deficient (DD) may turn out threatened. The implementation described actions challenging, urgent, given current crisis faced
Language: Английский
Citations
64
Acta Amazonica, Journal Year: 2024, Volume and Issue: 54(spe1)
Published: Jan. 1, 2024
ABSTRACT Amazonia (defined herein as the Amazon basin) is home to greatest concentration of biodiversity on Earth, providing unique genetic resources and ecological functions that contribute ecosystem services globally. The lengthy complex evolutionary history this region has produced heterogeneous landscapes riverscapes at multiple scales, altered geographic connections among populations, impacted rates adaptation, speciation, extinction. In turn, ecologically diverse Amazonian biotas promoted further diversification, species coexistence, coevolution, with accumulating over tens millions years. Important events in included: (i) late Cretaceous early Paleogene origin major rainforest plant animal groups; (ii) Eocene-Oligocene global cooling rainforests contracting tropical latitudes separating Atlantic coastal rainforests; (iii) Miocene uplift central northern Andes separated Pacific rainforests, spurred formation mega-wetlands western Amazon, contributed modern transcontinental River; (iv) Neogene Panamanian Isthmus facilitated Great American Biotic Interchange; (v) Pleistocene climate oscillations followed by Pleistocene-Holocene human colonization megafaunal extinctions; (vi) era widespread anthropogenic deforestation, defaunation, transformations regional climates. conservation requires decade-scale investments into documentation monitoring leverage existing scientific capacity, strategic habitat planning allow continuity processes now future.
Language: Английский
Citations
14
ZooKeys, Journal Year: 2025, Volume and Issue: 1224, P. 211 - 252
Published: Jan. 30, 2025
The emission of calls is one the most distinctive and important reproductive traits in anurans. Given biological significance vocalizations, this trait also useful for identification proposes key recognizing cryptic diversity. However, majority from tropical ecosystems, especially high Andean mountains, are unknown. Between 2016 2021, a total 14 expeditions were conducted to forests moorlands eastern western Mountain range province Carchi-Ecuador, at elevations ranging 2694 3848 m a.s.l. objective these was record anuran fauna present ecosystems. In total, 30 species recorded, 20 described, 15 which described reported first time study. call Hyloxalus delatorreae , critically endangered species, with remarkable recording Niceforonia brunnea considered mute. addition, nine candidate including Pristimantis farisorum Ecuador. This study represents comprehensive accurate acoustic documentation highland community, will facilitate taxonomic conservation work area.
Language: Английский
Citations
1
Nature Ecology & Evolution, Journal Year: 2023, Volume and Issue: 7(8), P. 1164 - 1165
Published: June 19, 2023
Language: Английский
Citations
17
Proceedings of the Royal Society B Biological Sciences, Journal Year: 2024, Volume and Issue: 291(2016)
Published: Feb. 14, 2024
In males, large testes size signifies high sperm production and is commonly linked to heightened competition levels. It may also evolve as a response an elevated risk of depletion due multiple mating or clutch sizes. Conversely, weapons, mate guarding allow individuals monopolize events preclude competition, thereby reducing the selection testes. Herein, we examined how paternal care, sexual dimorphism (SSD), weaponry female fecundity are in glassfrogs. We found that care was associated with reduction relative size, suggesting evolutionary trade-off between parenting. Although females were slightly larger than males species tended have clutches, there no significant relationship SSD, size. These findings suggest evolution glassfrogs influenced by risk, rather risk. infer precludes fertilization other consequently diminishes selective pressure for Our study highlights prominent role external fertilization.
Language: Английский
Citations
3
bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 13, 2025
Abstract The Andean region of Colombia is recognized for its exceptional biodiversity and high levels endemism, particularly among amphibians reptiles. However, this faces significant challenges due to habitat loss fragmentation driven by agricultural activities, urbanization, livestock farming. This study evaluates the effects alterations on herpetofaunal communities within Sumapaz province, focusing three types: secondary forests, coffee plantations, open areas associated with low-intensity We also compiled a comprehensive inventory 85 species based fieldwork conducted (2021-2022) databases, recognizing 35 50 reptiles region. found that forests support highest richness diversity species, while exhibited greater reptile abundance. Crops showed lower but demonstrated potential as habitats certain species. These findings highlight importance preserving forested designing mixed-use landscapes promote maintain ecological functions. provides baseline future conservation strategies in
Language: Английский
Citations
0
PLoS ONE, Journal Year: 2025, Volume and Issue: 20(4), P. e0309642 - e0309642
Published: April 11, 2025
The choice of where to breed can have fundamental consequences for offspring development and survival. Among amphibians, desiccation is one the biggest threats survival, especially in species that deposit their clutches terrestrial habitats. In several species, hydration clutch ensured by a caregiving parent, but without prolonged care, site selection becomes critically important securing constant external sources hydration. We used Spiny Cochran frog ( Teratohyla spinosa ), Neotropical glassfrog which females perform only short-term brooding clutches, then both parents leave offspring, test effect oviposition within leaves on Previous observations revealed this preferentially deposits eggs underside close margins. hypothesized T. strategically chooses position ensure during embryonic development, as water drops will slide from edges tip before dripping. To end, we performed translocation experiment manipulated location placing them away leaf margin compared level hydration, hatching time, mortality rate were kept Contrary our expectations, found not affected leaf. These findings suggest observed deposition enhancing conditions – at least under high humidity conditions.
Language: Английский
Citations
0
South American Journal of Herpetology, Journal Year: 2025, Volume and Issue: 34(1)
Published: April 28, 2025
Language: Английский
Citations
0
PeerJ, Journal Year: 2021, Volume and Issue: 9, P. e11914 - e11914
Published: Aug. 6, 2021
We provide several lines of evidence to delimit a new species Hyloscirtus and define its phylogenetic position inside the bogotensis group. The is sister taxon mashpi related clade formed by H. alytolylax putative from province El Oro in, southwestern Ecuador. conscientia sp. nov. described montane forests Mira River basin in extreme northwestern characterized as follows: tympanic annulus conspicuous, tip snout dorsal view subacuminate, middorsal stripe melanophores larger less dense, skin with individual iridophores forming dots, scarcely distributed across dorsum. Our study also highlights importance Valley biogeographic barrier; suggesting research efforts north south valley are likely reveal additional endemic cryptic diversity. Finally, our partnership Reserva: Youth Land Trust, Rainforest Trust EcoMinga Foundation has produced novel meaningful way connect young people biodiversity discovery habitat conservation.
Language: Английский
Citations
17
PeerJ, Journal Year: 2022, Volume and Issue: 10, P. e13109 - e13109
Published: March 18, 2022
Background The Tropical Andes is the world’s most biodiverse hotspot. This region contains >1,000 amphibian species, more than half of which are endemic. Herein we describe two new glassfrog species (Centrolenidae: Hyalinobatrachium ) that discovered within relatively unexplored and isolated localities Ecuadorian Andes. Methods We employed morphological, acoustic, molecular methods to test hypothesis mashpi sp. nov H. nouns nov. science. Following standard methods, generated mitochondrial sequences (16S) 37 individuals in genus . inferred phylogenetic relationships comparison all other glassfrogs using Maximum Likelihood. In addition describing call nov., performed a discriminant analysis principal components (DAPC) with advertisement characteristics several congeners. Results Based on an integrative taxonomy approach, species. Morphological traits phylogeny unambiguously place taxa Both distinguished from mainly by their dorsal coloration ( i.e ., dorsum lime green small light yellow spots, head usually interorbital bar) transparent pericardium heart visible through ventral skin). exhibit high morphological similarity cryptic) occur close geographical proximity (closest aerial distance = 18.9 km); however, uncorrected p for gene 16S 4.6–4.7%, value greatly exceeds genetic between closely related centrolenid frogs. DAPC revealed acoustically distinct. Discussion Our findings congruent previous studies report degree endemism Toisán mountain range, appears be main Andean cordillera some groups. recommend both listed as Endangered, following IUCN criteria. These provide another example cryptic diversity Andes—further evidence fosters much biodiversity have resources catalog. Threatened mining exploitative industries, these many yet-to-be-discovered highlight dire need effective conservation measures—especially northwestern Ecuador.
Language: Английский
Citations
11