Assessing Connectivity of Rivers, Wetlands, and Seasonally Flooded Habitats for Fishes in the Napo Moist Forest Ecoregion Through High-Resolution Mapping

Опубликована: Янв. 1, 2024

The Napo Moist Forest Ecoregion contains an extensive network of healthy, free-flowing rivers, creating a dynamic mosaic seasonal and permanent flooding areas that fluctuate with the hydrological season are primary importance for sustaining fish diversity. However, ongoing global environmental changes, including deforestation, dam construction climate anomalies, disrupt flood pulse threaten connectivity between floodplain main river channels. This study informs freshwater conservation by identifying critical maintaining habitat lateral in this biodiversity hotspot through high-resolution mapping seasonally flooded habitats from 2018 to 2021. We developed predictive models identify surface water dynamics using deep learning model trained on Sentinel-1 images pseudo ground truth data sets. also assessed rivers' floodplains throughout seasons years. Our achieved high accuracy (mean pixel = 97%) predicted 4,801 km2 consistently present years four seasons. Notably, all watersheds exhibited significant year-to-year variation, particularly habitats. On average, covered 943 km2. Caquetá, Bajo Marañón, Napo, Pastaza collectively accounted nearly 60% area's across findings highlight role as connectors influencing overall patch dynamics, area fluctuations, tributaries. found major annual fluctuations (km²) area. reduction mean size during low cycle reduced number patches. It increased distance patches, reducing landscape connectivity. Despite specific patches maintained consistent conditions, holding crucial significance connectivity, emphasizing their aquatic diverse cycles regions.

Язык: Английский

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Mikromorfologi Gonad dan Tipe Reproduksi Ikan Lempuk (Gobiopterus sp.) sebagai Informasi untuk Upaya Domestikasi

Bioscientist Jurnal Ilmiah Biologi, Год журнала: 2024, Номер 12(1), С. 241 - 241

Опубликована: Июнь 2, 2024

Lempuk fish is a native Indonesian that endemic in the Ranu Grati tectonic lake, Pasuruan Regency, East Java. This research aims to provide information efforts domesticate lempuk fish, especially on reproductive aspects related microscopic characteristics of gonads and type (Gobiopterus sp). uses primary sexual method with gonadal histology. The variables observed included male female sex ratio, histological structure gonads, fish. All data was analyzed descriptively, qualitatively quantitatively by comparing literature. samples taken this were 39 Fish then preserved 10% formalin. number for analysis 20 individuals, while morphometric meristic there 8 individuals. results show morphologically has transparent body shape central line black or brown pigment total length around 2-3 cm. have reproduction develops asynchronously (asynchronous) because development oocytes ovaries shows variety developmental stages, namely initial growth stage (nuclear perinuclear chromatin), cortical alveolar, vitellogenesis, mature stage. ratio predominantly 0.64: 0.36. differences reflect different functions, where play role egg cell production, testes are responsible sperm formation. An imbalance indicates importance carrying out domestication steps order prevent extinction continuous population decline.

Язык: Английский

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Fungal Diversity in an Undisturbed Andean Páramo Soil in Quimsacocha (Ecuador)

Journal of Fungi, Год журнала: 2024, Номер 10(9), С. 623 - 623

Опубликована: Авг. 31, 2024

The Andean Páramo is an environment known for its high biodiversity; however, due to remote location and difficult access, it still relatively poorly studied. aim of this work was explore the fungal biodiversity Ecuadorian soils in undisturbed natural reserve Quimsacocha through ITS metabarconding with MiSeq platform. This analysis revealed presence 370 Amplicon Sequence Variants (ASVs), mainly composed by

Язык: Английский

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Ecuadorian Red Lists and the IUCN Red List: A Disconnect

Biodiversity Information Science and Standards, Год журнала: 2024, Номер 8

Опубликована: Окт. 10, 2024

Up-to-date and globally available information about the conservation status of biodiversity is paramount importance, given accelerating global loss. Governments rely on this for policies sustainable use biodiversity. Ecuador, a neotropical hotspot, harbors significant number endemic plant, animal, fungal species several these groups have been evaluated in Ecuadorian non-IUCN Red Lists. The IUCN List Threatened Species (IUCN 2024)—which necessarily incomplete—could be improved with works. See below discussions references each group. (See also Suppl. material 1 collaborating institutions their acronyms) Plants : Ecuador has ca. 18,800 vascular plant (Ulloa et al. 2018). Ecuador’s Plant Endemics (Leon-Yanez 2011) was an effort led by Catholic University's herbarium participation 80 experts from national international institutions. work revealed 78% 4,500 as threatened, but indicates 73% such. Fungi There no known catalog native taxa. Laessoe Petersen (2008) estimate 100,000 fungi Ecuador. Several are included Global Fungal Initiative (Mueller 2024) only three List. Insects No insects, nor available. An updated list type specimens (Salazar 2023) lists four most diverse insects Ecuador: Coleoptera (6,370), Lepidoptera (6,278), Diptera (2,895), Hymenoptera (2,467). Fishes 836 including 92 (11%) endemics (Barriga 2012). 35% fresh water fish considered threatened Ecuador; 21 collaborated (Aguirre 2021). considers 5% threatened. Amphibia A recent assessment found 635 amphibians 53% which categorized threatened; 33 assessments (Ortega 43% taxa according to Reptiles 401 reptile species, 27% them 15 collaborators participated report (Carrillo 2005). In List, 26% Birds 1,582 39 (2.5 %) (Remsen 2024). last prepared 77 (Freile 2019) 10% Mammals 471 62 (13%) (Tirira latest non IUCN-Red assessment, 124 at least museums, mentions that 29% 12% urgent need create efficient workflow made local taxonomists, training process 2016). With actions, large disparities, those observed fishes, mammals, could fixed.

Язык: Английский

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Small Streams Support Beta Diversity in Neotropical Fish Assemblages in the Upper Paraná River Basin

Ecology Of Freshwater Fish, Год журнала: 2024, Номер unknown

Опубликована: Окт. 27, 2024

ABSTRACT Variation in species composition along an environmental gradient (β‐diversity) can inform our understanding of biodiversity patterns and composition. Beta diversity be partitioned into contributions to beta (SCBD) local (LCBD). While SCBD describes the variations among samples, LCBD measures uniqueness a biological community within larger ecosystem. Recently developed metrics enabled estimation contribution total individual sites Utilising these metrics, one‐time survey 275 sampling points four sub‐basins Upper Paraná River Hydrographic Basin (low‐flow streams, < 5 m 3 /s) was conducted assess fish Our results show that limnological influences at different scales contribute higher LCBD. However, land use richness were not directly linked this outcome, suggesting with fewer contributed diversity. It concluded is more influenced by characteristics position longitudinal than based on (SCBD). Moreover, high values even found portions lower richness. This means small streams upper are unique comprised varied habitats increasing As such, they should seen as target development policies designed conserve their pristine condition.

Язык: Английский

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