Hummingbird diversity in a fragmented tropical landscape in the Chocó biogeographic zone. (30th January 2023)
- Record Type:
- Journal Article
- Title:
- Hummingbird diversity in a fragmented tropical landscape in the Chocó biogeographic zone. (30th January 2023)
- Main Title:
- Hummingbird diversity in a fragmented tropical landscape in the Chocó biogeographic zone
- Authors:
- Huh, Kyu Min
Ellis, Mike
Castillo, Fernando
Carrasco, Luis
Rivero de Aguilar, Juan
Bonaccorso, Elisa
Browne, Luke
Karubian, Jordan - Abstract:
- Abstract: Forest loss and fragmentation drive widespread declines in biodiversity. However, hummingbirds seem to exhibit relative resilience to disturbance, characterized by increasing abundance alongside declining species richness and evenness. Yet, how widespread this pattern may be, and the mechanisms by which it may occur, remain unclear. To fill in this knowledge gap, we investigated habitat‐ and site‐level patterns of diversity, and community composition of hummingbirds between continuous forest (transects n = 16 in ~3500 ha) and more disturbed surrounding fragments ( n = 39, 2.5–48.0 ha) in the Chocó rain forest of northwestern Ecuador. Next, we assessed within‐patch and patch‐matrix characteristics associated with hummingbird diversity and composition. We found higher hummingbird species richness in forest fragments relative to the continuous forest, driven by increased captures of rare species in fragments. Community composition also differed between continuous forest and fragments, with depressed evenness in fragments. Increased canopy openness and density of medium‐sized trees correlated with hummingbird diversity in forest fragments, although this relationship became nonsignificant after applying false discovery rate ( p < .01). Higher species richness in fragments and higher evenness in the continuous forest highlight the complex trade‐offs involved in the conservation of this ecologically important group of birds in changing Neotropical landscapes. AbstractAbstract: Forest loss and fragmentation drive widespread declines in biodiversity. However, hummingbirds seem to exhibit relative resilience to disturbance, characterized by increasing abundance alongside declining species richness and evenness. Yet, how widespread this pattern may be, and the mechanisms by which it may occur, remain unclear. To fill in this knowledge gap, we investigated habitat‐ and site‐level patterns of diversity, and community composition of hummingbirds between continuous forest (transects n = 16 in ~3500 ha) and more disturbed surrounding fragments ( n = 39, 2.5–48.0 ha) in the Chocó rain forest of northwestern Ecuador. Next, we assessed within‐patch and patch‐matrix characteristics associated with hummingbird diversity and composition. We found higher hummingbird species richness in forest fragments relative to the continuous forest, driven by increased captures of rare species in fragments. Community composition also differed between continuous forest and fragments, with depressed evenness in fragments. Increased canopy openness and density of medium‐sized trees correlated with hummingbird diversity in forest fragments, although this relationship became nonsignificant after applying false discovery rate ( p < .01). Higher species richness in fragments and higher evenness in the continuous forest highlight the complex trade‐offs involved in the conservation of this ecologically important group of birds in changing Neotropical landscapes. Abstract in Spanish is available with online material. Abstract : We investigated habitat‐ and site‐level patterns of diversity, and community composition of hummingbirds between continuous forest (transects n = 16 in ~3500 ha) and more disturbed surrounding fragments ( n = 39, 2.5–48.0 ha) in the Chocó rainforest of northwestern Ecuador. We found higher hummingbird species richness in forest fragments relative to the continuous forest, while the continuous forest accommodated a more evenly distributed community. Higher species richness in fragments and higher evenness in the continuous forest highlight the complex trade‐offs involved in the conservation of this ecologically important group of birds in changing Neotropical landscapes. RESUMO: La pérdida y la fragmentación de los bosques lleva un descenso extendido de la biodiversidad. Sin embargo, los colibríes parecen mostrar una relativa resistencia a las perturbaciones, caracterizada por el aumento de la abundancia junto con la disminución de la riqueza y la uniformidad de las especies. Aún no está claro el alcance de este patrón ni los mecanismos por los que puede producirse. Para llenar este vacío de conocimiento, investigamos los patrones de diversidad a nivel de hábitat y de sitio, y la composición de la comunidad de colibríes entre el bosque continuo (transectos n = 16 en ~3500 hectáreas) y los fragmentos circundantes más perturbados ( n = 39, 2, 5–48, 0 hectáreas) en la selva tropical del Chocó del noroeste de Ecuador. A continuación, evaluamos las características de los parches y de la matriz de parches asociadas a la diversidad y composición de los colibríes. Encontramos una mayor riqueza de especies de colibríes en los fragmentos de bosque en relación con el bosque continuo, impulsada por el aumento de las capturas de especies raras en los fragmentos. La composición de la comunidad también difiere entre el bosque continuo y los fragmentos, con una uniformidad menor en los fragmentos. La mayor del dolsel arbóreo y la densidad de árboles de tamaño medio tuvieron correlato con la diversidad de colibríes en los fragmentos, aunque esta relación dejó de ser significativa tras aplicar la tasa de falsos descubrimientos ( p < 0, 01). La mayor riqueza de especies en los fragmentos y la mayor uniformidad en el bosque continuo recalca las complejas compensaciones en la conservación de este grupo de aves ecológicamente importante en los cambiantes paisajes neotropicales. … (more)
- Is Part Of:
- Biotropica. Volume 55:Number 2(2023)
- Journal:
- Biotropica
- Issue:
- Volume 55:Number 2(2023)
- Issue Display:
- Volume 55, Issue 2 (2023)
- Year:
- 2023
- Volume:
- 55
- Issue:
- 2
- Issue Sort Value:
- 2023-0055-0002-0000
- Page Start:
- 418
- Page End:
- 429
- Publication Date:
- 2023-01-30
- Subjects:
- composition -- countryside biogeography -- Ecuador -- evenness -- fragmentation -- Hill numbers -- Reserva Ecológica Mache‐Chindul
Biotic communities -- Tropics -- Periodicals
Applied ecology -- Tropics -- Periodicals
Biology -- Tropics -- Periodicals
577.80913 - Journal URLs:
- http://catalog.hathitrust.org/api/volumes/oclc/1536475.html ↗
http://firstsearch.oclc.org ↗
http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1744-7429 ↗
http://www.bioone.org/bioone/?request=get-journals-list&issn=0006-3606 ↗
http://www.blackwell-synergy.com/rd.asp?goto=journal&code=btp ↗
http://www.jstor.org/journals/00063606.html ↗
http://onlinelibrary.wiley.com/ ↗
http://www.blackwell-synergy.com/loi/btp ↗ - DOI:
- 10.1111/btp.13196 ↗
- Languages:
- English
- ISSNs:
- 0006-3606
- Deposit Type:
- Legaldeposit
- View Content:
- Available online (eLD content is only available in our Reading Rooms) ↗
- Physical Locations:
- British Library DSC - 2089.900000
British Library DSC - BLDSS-3PM
British Library STI - ELD Digital store - Ingest File:
- 26290.xml