More than 17,000 tree species are at risk from rapid global change

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Jan. 2, 2024

Abstract Trees are pivotal to global biodiversity and nature’s contributions people, yet accelerating changes threaten tree diversity, making accurate species extinction risk assessments necessary. To identify that require expert-based re-evaluation, we assess exposure change in six anthropogenic threats over the last two decades for 32,090 species. We estimated half (54.2%) of assessed have been exposed increasing threats. Only 8.7% these considered threatened by IUCN Red List, whereas they include more than Data Deficient (57.8%). These findings suggest a substantial underestimation associated current assessments. also map hotspots rapidly changing around world. Our data-driven approach can strengthen efforts going into List facilitating prioritization among allowing efficient conservation efforts.

Language: Английский

---

Bringing the forest back: Restoration priorities in Colombia

Diversity and Distributions, Journal Year: 2024, Volume and Issue: 30(4)

Published: Feb. 29, 2024

Abstract Aim Colombia has committed to ambitious forest restoration targets which include a 1 million ha Bonn Challenge commitment and 6.47–8.31 (rehabilitation restoration, respectively) under the National Restoration Plan. Determining where how implement programs achieve these remains significant challenge. Location Colombia. Methods We adopt multi‐objective optimisation framework for planning apply it explore cost‐effective solutions that leverage potential assisted natural regeneration benefits while accounting opportunity establishment costs of maximising biodiversity conservation climate change mitigation benefits. four politically relevant area‐based (1, 6, 6.47 8.31 ha) identify minimum cost, suites maximum benefit solutions. Results simultaneously perform well across carbon objectives, despite trade‐offs between objectives. find can on average 91.1%, 90.8%, 90.5% 90.1% 100% significantly reducing costs. On average, reduce cost by 87.5%, 56.8%, 59.6% 46.2% compared considering one, six, targets, respectively. Main Conclusions bold such as those new 2030 Convention Biological Diversity Global Biodiversity Framework. Strategic will play an important role in achieving Colombia's goals. provide quantitative evidence inform environmentally economically sensible policy practice country. Our results help guide towards meeting its cost‐effectively.

Language: Английский

---

Assessing the efficiency of bird habitat conservation strategies in farmland ecosystems

Ecological Modelling, Journal Year: 2024, Volume and Issue: 492, P. 110732 - 110732

Published: April 30, 2024

Language: Английский

---

Prioritizing ecological connectivity among protected areas in Colombia using a functional approach for birds

Global Ecology and Conservation, Journal Year: 2023, Volume and Issue: 48, P. e02713 - e02713

Published: Nov. 4, 2023

Ecological connectivity among Protected Areas (PAs) is essential to improve biodiversity conservation and management effectiveness under global change. In Colombia, developing strategic plans locating spatial priorities for PA fundamental conserving its extraordinary bird diversity in the face of multiple threats, including deforestation climate Here, we develop a multispecies model identify critical sites preserving enhancing ecological connections PAs Colombia. We focused our analyses on 26 forest-dependent species, determining their potential suitable habitat across Colombia using species distribution models climatic variables. Expert knowledge guided construction movement resistance surfaces these distributions describe how different land covers impede or facilitate movement. Using inputs, mapped Least-Cost Corridors connecting national subnational meeting area requirements selected species. Additionally, used circuit least-cost locate restoration opportunities, estimating gains through Equivalent Connected Area (ECA) index. aggregated individual results create composite maps highlighting agreements corridors, priority areas, opportunities. found 581,531 km2 belonging corridors all focal Priority within covered 212,551 were predominantly located Andean Amazonian forests. Restoration opportunities 79,203 concentrated agricultural lands Andes Caribbean regions. Restoring areas could increase forest cover by 7% 14%. Our provide national-level assessment functional maintain interconnections This guide efforts related conservation, restoration, implementation tools that native transformed lands. These actions are crucial meet targets outlined post-2020 framework achieve well-connected systems during this decade until 2050.

Language: Английский

---

Citizen science data reveal altitudinal movement and seasonal ecosystem use by hummingbirds in the Andes Mountains

Ecography, Journal Year: 2023, Volume and Issue: 2024(3)

Published: Dec. 12, 2023

Ensuring connectivity is crucial to protect landscapes but it requires knowledge about how animals use ecosystems throughout the year. However, animal movements remain largely unknown in biodiversity hotspots, even for species that fulfill key ecological roles, as case of hummingbirds Andes. In complex topography mountain slopes, movement these avian pollinators may occur either between habitat patches with asynchronous plant blooms or across are located within same elevation bands along altitudinal gradients. Here, we used two decades (2000–2020) records from citizen science data and boosted regression trees predict monthly distributions 55 hummingbird We identified shifts distribution contiguous months calculated changes proportion predicted occupied by ecosystem types. Our findings reveal substantial differences types utilized year had not been previously reported several species. Yet magnitude varies clades, some cases estimated occurs little variation altitude. All Andes show temporal occurrence, higher natural compared croplands urban areas. Finally, phylogenetic logistic test whether affect population trends. found seasonality more strongly associated decreasing populations comparison shifts. Altogether, our study reveals patterns highlights importance different More generally, demonstrates opportunity using increase understanding species' seasonal occurrences, so can be better managed movement. Keywords: trees, eBird, connectivity, models

Language: Английский

---

Forest Connectivity Loss Surpasses Deforestation in the Colombian Andean Forests

Published: Jan. 1, 2025

Language: Английский

---

Integrating multiple data sources to develop range and area of habitat maps tailored for local contexts

Diversity and Distributions, Journal Year: 2024, Volume and Issue: 30(10)

Published: Aug. 15, 2024

Abstract Aim Global species distribution maps tend to be limited a reduced number of or are too coarse inform ecological research and conservation actions at local scales. We developed workflow generate range area habitat (AOH) tailored contexts based on expert information, community science observations an ecoregion approach. also increase transparency in map the areas uncertainty levels using data. Location North‐Western South America. Methods combined knowledge, observations, new ecoregions for Colombia national land cover produce AOH 94% terrestrial resident birds (1633 species). used records validate species‐specific layer by calculating distance between pixels classified as occurrence points. Results Compared previous efforts, have higher coverage produced better validation scores more than 50% analysed. In addition, show macroecological patterns that follow natural boundaries, significantly improving arbitrary observed mapping efforts. Uncertainty illustrate spatial resolution extent which these can with highest confidence highlight poorly surveyed require extensive sampling. Main Conclusions Combining information from sources, field broad is key improve fitted applications. Our analysis guide concerted efforts survey specific localities. multiple regions, countries other taxa, we expect it will estimates biogeographical diversity patterns.

Language: Английский

---

Ecosystem extent is a necessary but not sufficient indicator of the state of global forest biodiversity

Conservation Letters, Journal Year: 2024, Volume and Issue: 17(5)

Published: Aug. 22, 2024

Abstract The Kunming‐Montreal Global Biodiversity Framework lays out an ambitious set of goals and targets aimed at halting reversing biodiversity loss. extent natural ecosystems has been selected as one a small headline indicators against which countries will report progress under this framework. We evaluate the effectiveness with indicator is expected to capture overall scope ecosystem‐focused component Goal A, interlinkages species‐focused same goal, using extensive global data on integrity, connectivity, plant species composition forests. Results generated for all forest‐supporting demonstrate that consideration these additional factors can profoundly alter understanding state forest relative based alone. Employment ecosystem must therefore be augmented by appropriate use complementary addressing other key dimensions change.

Language: Английский

---

Abundance models of endemic birds of the Sierra Nevada de Santa Marta, northern South America, suggest small population sizes and dependence on montane elevations

Ornithological Applications, Journal Year: 2024, Volume and Issue: 126(2)

Published: Jan. 31, 2024

Abstract Abundance measures are almost non-existent for several bird species threatened with extinction, particularly range-restricted Neotropical taxa, which estimating population sizes can be challenging. Here we use data collected over 9 years to explore the abundance of 11 endemic birds from Sierra Nevada de Santa Marta (SNSM), one Earth’s most irreplaceable ecosystems. We established 99 transects in “Cuchilla San Lorenzo” Important Bird Area within native forest, early successional vegetation, and areas transformed vegetation by human activities. A total 763 counts were carried out covering entire elevation range study area (~175–2,650 m). applied hierarchical distance-sampling models assess elevation- habitat-related variation local obtain values density effective size. Most more abundant montane elevational (1,800–2,650 Habitat-related differences only detected 5 species, numerous either succession, secondary or areas. Inferences size indicated that at least 4 endemics likely maintain populations no larger than 15,000–20,000 mature individuals. species’ occupancy lower previously described, a possible consequence increasing anthropogenic threats. At exceeded criteria listing thorough evaluation their extinction risk should conducted. Population strongholds located on northern western slopes SNSM between 1,500 2,700 m. highlight urgent need facilitating protection premontane ecosystems safeguard critical habitats SNSM’s avifauna. Follow-up studies collecting across needed precise range-wide estimations all species.

Language: Английский

---

Nearly half of Colombian artisan craft plant species lack national and international vulnerability assessments

Ecosystems and People, Journal Year: 2024, Volume and Issue: 20(1)

Published: Nov. 5, 2024

Language: Английский

---