Guide to Tendrillate Climbers of Costa Rican Mountains

Krings, Alexander; Braham, Richard R.

doi:10.1002/9780470292082

Cited by 2 publications

(4 citation statements)

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“…Sechium talamancensis is a monoecious tendrillate vine ( fig. 1A) endemic to Costa Rica, found from 1,500 to 2,800 m a.s.l (Krings & Braham 2005). Its structure and habit is similar to its lower elevation congeners, economically important S. edule (Jacq.)…”

Section: Methodsmentioning

confidence: 95%

“…The lack of this phenomenon in the low elevation congeners of S. talamancensis (S. edule and S. tacacao) that have similar floral structures (Krings & Braham 2005) is puzzling. The selective advantage of presentation of pollen on primary and secondary surfaces in S. talamancensis could be due to the lack of specificity or high variability in the way pollinators arrive to the flower.…”

Section: Discussionmentioning

confidence: 99%

“…Staminate flowers of S. talamancensis are borne on axillary panicles ( fig. 1B) (Krings & Braham 2005). The flowers are actinomorphic and pentamerous.…”

Section: Methodsmentioning

confidence: 99%

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First record on secondary pollen presentation in the Cucurbitaceae family

Jadeja¹

2015

Plecevo

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Aim -Secondary pollen presentation in flowers has been described only in a few species across about 25 plant families. The first report of secondary pollen presentation in the Cucurbitaceae family is given here. Key result -Sechium talamancensis, endemic to high elevations in Costa Rica, presents nearly 39% of its pollen secondarily on the distal ends of its petals. The remaining pollen is presented on the anthers, the primary pollen presenters. Significance -Closely related and commercially important congeners of S. talamancensis do not show secondary pollen presentation. Potential selective advantages of the phenomenon that differentiates S. talamancensis from its lower elevation congeners are discussed.

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Section: Methodsmentioning

confidence: 95%

Section: Discussionmentioning

confidence: 99%

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First record on secondary pollen presentation in the Cucurbitaceae family

Jadeja¹

2015

Plecevo

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“…(Witkowski and Garner 2008;Peerbhay et al 2016). The climber Cardiospermum grandiflorum Sw. grows vigorously in damp conditions preferably along forest margins and watercourses of the subtropics (Simelane et al 2011), climbing to heights of 6 m up to 10 m (Henderson 2001;Krings and Braham 2005). Once the invader is well established, it forms a smothering curtain which outcompete indigenous species for sunlight (Simelane et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Invasive alien plant species, fragmentation and scale effects on urban forest community composition in Durban, South Africa

Mavimbela

Sieben

Procheş

2018

N.Z. j. of For. Sci.

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Background: Urban forests are under increased pressure from invasion by exotic (alien) species. The vegetation present in the matrix of urban sites is a rich source of alien invasive propagules, which increases the risk of alien invasion in forests within an urban space, leading to a decline in indigenous species. Therefore, determining the distribution patterns of native and exotic species as influenced by environmental factors can assist in quantifying the impact of exotic species at broad scales based on responses on a finer scale. Quantifying the effects of multiple environmental factors on the distribution patterns of both indigenous and alien species in the ecosystem may help in prescribing suitable management efforts. Methods: Fifteen forest patches were sampled in the eThekwini (Durban) Municipality and data collected from 74 100-m 2 plots with different degrees of invasion. Indigenous and alien species of trees, shrubs and climbers occurring in ten and more plots were considered for analysis and the CANOCO 5.1 package was used to run various constrained ordination analyses. Variation partitioning analysis was used to assess the impact of environmental variables at different spatial scales, namely the plot and patch scales. Results: Canopy gaps are the major controlling factor for invasive alien plants (IAPs) occurrence at fine scale. At patch level, residential and industry areas outside the boundaries (buffer area) of forest patches have a high influence on the distribution of IAPs. Communities dominated by the invasive Chromolaena odorata (L.) R.M. King are most common on the lowland coastal forests while communities dominated by either Litsea glutinosa (Lour.) C.B.Rob. or Cardiospermum grandiflorum Sw. can prevail in both lowland coastal and scarp forests. Conclusions: Canopy gaps in lowland forests can facilitate the transition of native forests to novel communities containing a variety of alien plant species. Communities of shrub, climber and tree IAPs occur in lowland coastal forests while climber and tree IAPs dominate the high-elevation scarp forests. The resilience shown by some native species to the tree, shrub and climber IAPs by remaining when IAPs establish makes these species very suitable for restoration projects. Forest patches surrounded by a high incidence of residential and industrial areas in the buffer matrix are likely to have a high diversity of IAPs. Larger patch size and high connectivity to nearby native forests are key in reducing invasion by IAPs.

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Guide to Tendrillate Climbers of Costa Rican Mountains

Cited by 2 publications

References 0 publications

First record on secondary pollen presentation in the Cucurbitaceae family

First record on secondary pollen presentation in the Cucurbitaceae family

Invasive alien plant species, fragmentation and scale effects on urban forest community composition in Durban, South Africa

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