Geomorphic Traces of Quaternary Climates in the Cordillera Central, Dominican Republic

Orvis, Kenneth H.; Clark, Gregory M.; Horn, Sally P.; Kennedy, Lisa M.

doi:10.2307/3674022

Cited by 17 publications

(15 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…, 2010). Data from fossils, pollen, eolianite deposits and geomorphic features indicate that temperatures in the Caribbean during the LGM were about 4.5 °C lower and climate was substantially more arid than in the present day (Schubert, 1988; Orvis et al. , 1997; Guilderson et al.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Deep intra-island divergence of a montane forest endemic: phylogeography of the Puerto Rican frog Eleutherodactylus portoricensis (Anura: Eleutherodactylidae)

Barker

Waide

Cook

2011

Journal of Biogeography

View full text Add to dashboard Cite

Aim Hypotheses proposed for lineage diversification of tropical montane species have rarely been tested within oceanic islands. Our goal was to understand how basin barriers and Pleistocene climatic fluctuations shaped the distribution of diversity in Eleutherodactylus portoricensis (Eleutherodactylidae), a frog endemic to the montane rain forests of Puerto Rico.Location The north-eastern (Luquillo) and south-eastern (Cayey) mountains of Puerto Rico.Methods We generated mitochondrial DNA (mtDNA) control region sequences (c. 565 bp) from 144 individuals of E. portoricensis representing 16 localities, and sequenced 646 bp of cytochrome b and 596 bp of nuclear DNA (nDNA) rhodopsin exon and intron 1 from a subset of individuals. We conducted a phylogenetic analysis on the mtDNA sequence data and explored population substructure with maximum parsimony networks, a spatial analysis of molecular variance, and pairwise F ST analysis. Coalescent simulations were performed to test alternative models of population divergence in response to late Pleistocene interglacial periods. Historical demography was assessed through coalescent analyses and Bayesian skyline plots. ResultsWe found: (1) two highly divergent groups associated with the disjunct Luquillo and Cayey Mountains, respectively; (2) a shallow mtDNA genetic discontinuity across the La Plata Basin within the Cayey Mountains; (3) phylogeographic congruence between nDNA and mtDNA markers; (4) divergence dates for both mtDNA and nDNA pre-dating the Holocene interglacial (c. 10 ka), and nDNA suggesting divergence in the penultimate interglacial (c. 245 ka); and (5) historical demographic stability in both lineages. Main conclusionsThe low-elevation Caguas Basin is a long-term barrier to gene flow between the two montane frog populations. Measures of genetic diversity for mtDNA were similar in both lineages, but lower nDNA diversity in the Luquillo Mountains lineage suggests infrequent dispersal between the two mountain ranges and colonization by a low-diversity founder population. Population divergence began prior to the Holocene interglacial. Stable population sizes over time indicate a lack of demonstrable demographic response to climatic changes during the last glacial period. This study highlights the importance of topographic complexity in promoting within-island vicariant speciation in the Greater Antilles, and indicates long-term persistence and lineage diversification despite late Pleistocene climatic oscillations.

show abstract

Section: Discussionmentioning

confidence: 99%

“…There is substantial evidence that climate change occurring since the Last Glacial Maximum (LGM; 21 ka) altered the type and range of habitats in the Caribbean (Schubert, 1988; Orvis et al. , 1997; Renken et al.…”

Section: Introductionmentioning

confidence: 99%

Deep intra-island divergence of a montane forest endemic: phylogeography of the Puerto Rican frog Eleutherodactylus portoricensis (Anura: Eleutherodactylidae)

Barker

Waide

Cook

2011

Journal of Biogeography

View full text Add to dashboard Cite

show abstract

“…A second shorter, less‐intense dry season generally occurs in August. Mean annual temperatures, extrapolated from lapse rates (−8.5°C/1000 m; inland sea level potential temperature of 27.9°C) in Orvis et al (1997), are in the range of 7.2–8.3°C at the study sites.…”

Section: Methodsmentioning

confidence: 99%

“…Three peaks reach near or above 3000 m, but at 19° N, even the highest parts of the range are below the modern climatic treeline. At elevations > 2000 m, vegetation is subject to freezing temperatures (Pedersen 1953) and drought (particularly in winter) due to the trade wind inversion (TWI), which caps the moisture‐laden marine boundary layer at elevations of 2000–2300 m (Schubert et al 1995, Orvis et al 1997) and confines maximum rainfall to lower windward slopes. Forests above 2000 m are dominated by a single endemic pine species, Pinus occidentalis Swartz (Hispaniolan pine), which forms dense stands or open woodlands interspersed with tussock grass savannas.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Postfire Vegetation Recovery in Highland Pine Forests of the Dominican Republic

Kennedy

Horn

2008

Biotropica

Self Cite

View full text Add to dashboard Cite

We surveyed postfire vegetation at five sites at high elevations (> 2000 m) in the Cordillera Central, Dominican Republic. Highlands of the Cordillera Central are dominated by a single pine species, Pinus occidentalis, but plant communities are rich with endemics and conservation and fire management efforts in these systems are ongoing. The burns were 2–7 yr in age and had consumed nearly all shrub crowns. Pines suffered high mortality (> 50%, all sites combined), but shrubs resprouted at high rates (88%, N= 957) after fire. All shrub taxa produced basal resprouts; eight of 11 shrub taxa measured had resprouting rates > 90 percent, while Baccharis myrsinites had the lowest (56%). Most taxa grew to prefire height quickly (within 5–7 yr), with regrowth of stem diameters lagging behind. Patterns and rates of shrub recovery resembled those documented in high elevation shrublands in Costa Rica and Brazil. Pinus occidentalis does not resprout, but larger individuals can survive fire. Survival increases dramatically when trees attain > 13‐cm dbh, when bark becomes thick enough to protect cambial tissue. Overall, pines are regenerating much more slowly than shrubs, but seedling establishment varied considerably between sites. Frequent fires may cause a decline in pines and an increase in shrub‐ or grass‐dominated communities. Succession in these high elevation fire‐dependent pine forests favors taxa already present in the preburn vegetation, with woody composition changing little after fire, in contrast to lower‐elevation cloud forest, where postfire vegetation has been shown to bear little resemblance to mature forest even after several years.

show abstract

A 10,300 ¹⁴C yr Record of Climate and Vegetation Change from Haiti

et al. 1999

View full text Add to dashboard Cite

Pleistocene and Holocene vegetation dynamics in the American tropics are inferred largely from pollen in continental lake sediments. Maritime influences may have moderated climate and vegetation changes on Caribbean islands. Stable isotope (δ18O) study of a 7.6-m core from Lake Miragoane, Haiti, provided a high-resolution record of changing evaporation/precipitation (E/P) since ∼10,300 14C yr B.P. The Miragoane pollen record documents climate influences and human impacts on vegetation in Hispaniola. The δ18O and pollen data near the base of the core indicate cool, dry conditions before ∼10,000 14C yr B.P. Lake Miragoane filled with water in the early Holocene as E/P declined and the freshwater aquifer rose. Despite increasing early Holocene moisture, shrubby, xeric vegetation persisted. Forest expanded ∼7000 14C yr B.P. in response to greater effective moisture and warming. The middle Holocene (∼7000–3200 14C yr B.P.) was characterized by high lake levels and greatest relative abundance of pollen from moist forest taxa. Climatic drying that began ∼3200 14C yr B.P. may have driven some mesophilic animal species to extinction. The pollen record of the last millennium reflects pre-Columbian (Taino) and European deforestation. Long-term, Holocene vegetation trends in southern Haiti are comparable to trends from continental, lowland circum-Caribbean sites, suggesting a common response to regional climate change.

show abstract

Geomorphic Traces of Quaternary Climates in the Cordillera Central, Dominican Republic

Cited by 17 publications

References 22 publications

Deep intra-island divergence of a montane forest endemic: phylogeography of the Puerto Rican frog Eleutherodactylus portoricensis (Anura: Eleutherodactylidae)

Deep intra-island divergence of a montane forest endemic: phylogeography of the Puerto Rican frog Eleutherodactylus portoricensis (Anura: Eleutherodactylidae)

Postfire Vegetation Recovery in Highland Pine Forests of the Dominican Republic

A 10,300 ¹⁴C yr Record of Climate and Vegetation Change from Haiti

Contact Info

Product

Resources

About

Geomorphic Traces of Quaternary Climates in the Cordillera Central, Dominican Republic

Cited by 17 publications

References 22 publications

Deep intra-island divergence of a montane forest endemic: phylogeography of the Puerto Rican frog Eleutherodactylus portoricensis (Anura: Eleutherodactylidae)

Deep intra-island divergence of a montane forest endemic: phylogeography of the Puerto Rican frog Eleutherodactylus portoricensis (Anura: Eleutherodactylidae)

Postfire Vegetation Recovery in Highland Pine Forests of the Dominican Republic

A 10,300 14C yr Record of Climate and Vegetation Change from Haiti

Contact Info

Product

Resources

About

A 10,300 ¹⁴C yr Record of Climate and Vegetation Change from Haiti