Population structure of the invasive species Leucaena leucocephala (Fabaceae) in a seasonal semi-deciduous forest, southern Brazil

2015 ◽  
Vol 63 (7) ◽  
pp. 590
Author(s):  
Janete T. Costa ◽  
Inês C. B. Fonseca ◽  
Edmilson Bianchini
Keyword(s):  
Invasive Species ◽  
Leucaena Leucocephala ◽  
Deciduous Forest ◽  
Recruitment Rate ◽  
Invasive Species Management ◽  
Southern Brazil ◽  
Disturbed Areas ◽  
Forest Remnant ◽  
Negative Exponential ◽  
High Recruitment

Biological invasions are one of the great threats of our time, and the accumulation of knowledge of invasive species is essential for invasive species management. In this study, aspects of the population ecology of Leucaena leucocephala (Lam) de Wit were investigated in a seasonal semi-deciduous forest remnant (23°15ʹ28ʹʹS, 51°01ʹ52ʹʹW – centre of the remnant) in Southern Brazil to evaluate whether the species is invading the remnant. In the first season, 1974 individuals, distributed heterogeneously in the remnant, were sampled. The population height structure fitted a negative exponential growth curve function (r2 = 0.9), indicating that the population was persisting through recruitment. The population also had a grouped spatial pattern and high recruitment rate. The species invaded the disturbed areas of the remnant. Gradual eradication is recommended for L. leucocephala for the remnant.

scholarly journals Ferns and lycophytes from Lagoa do Peri Municipal Park, Santa Catarina, Brazil

Check List ◽  
2020 ◽  
Vol 16 (5) ◽  
pp. 1305-1322
Author(s):  
Amanda Angélica Carmes ◽  
Michele de Sá Dechoum ◽  
Duane Fernandes Lima ◽  
Andre Luís de Gasper ◽  
Fernando B. Matos ◽  
...  
Keyword(s):  
Invasive Species ◽  
Atlantic Forest ◽  
Anthropogenic Activities ◽  
Herbarium Specimens ◽  
Southern Brazil ◽  
Santa Catarina ◽  
Exotic Invasive Species ◽  
Forest Remnant ◽  
Exotic Invasive ◽  
Ferns And Lycophytes

A checklist of ferns and lycophytes from the Lagoa do Peri Municipal Park (LPMP), an Atlantic Forest remnant in Florianópolis, Santa Catarina, southern Brazil, is presented. Collections were made from October 2015 to April 2016. Herbarium specimens were also analyzed. A total of 81 species of ferns and one lycophyte were found, belonging to 14 families and 42 genera. The most representative families were Polypodiaceae (21 spp.) and Pteridaceae (12 spp.). Among the species, 44% were terrestrial, 31% epiphytes, 29% rupicolous, and 2% hemi-epiphytes. Macrothelypteris torresiana (Gaudich.) Ching, an exotic invasive species, was recorded. The number of species found here is lower than reported for similar areas, likely due to anthropogenic activities around and within the park. The constant urbanization occurring around the LPMP emphasizes the importance of the park for conservation of the Atlantic Forest and for maintaining the diversity of ferns and lycophytes.

Forage palatability of Broussonetia papyrifera an invasive species in Ghana: Relative preference and palatability by sheep and goats

2018 ◽  
Vol 2 (2) ◽  
pp. 63-70 ◽  
Author(s):  
R. Obour
Keyword(s):  
Invasive Species ◽  
Leucaena Leucocephala ◽  
Condensed Tannin ◽  
Block Design ◽  
Wet Season ◽  
Broussonetia Papyrifera ◽  
Sheep And Goats ◽  
Relative Preference ◽  
Exotic Tree ◽  
High Level

Broussonetia papyrifera is an exotic tree widely grown for paper production. Due to its prolific regeneration it has invaded forestcanopy gaps and degraded farmlands and has now become an invasive species in Ghana. In enhancing its value for use the plantwas evaluated as potential forage for grazing animals vis-à-vis other two existing forage plants: Ficus exasperata and Leucaenaleucocephala.The study assessed the palatability and preference of Broussonetia papyrifera using sheep and goats for the wet anddry seasons.The species were assessed in indoor pen feeding trials using eight-unit (3×3 m) pens with the cafeteria method.The amount of forage offered was 100g (fresh material) in all instances for each species and for ten minutes. Adesign basedon 3×2×2 factorial in Randomized Complete Block Design (RCBD) was used to test the differences in palatability betweenthe three forage species.Results revealed that palatability was higher (P<0.05) in Leucaena leucocephala compared with Ficusexasperata and Broussonetia papyrifera for sheep and goats across seasons. The trend shown might be the result of the effectsof familiarity with the Leucaena leucocephala since animals tend to select plants that are familiar than newly introduced andunfamiliar plants. The study also revealed high level of condensed tannin (CT) in Broussonetia papyrifera which might haveinterfered with forage intake by the animals.There were no significant differences in palatability of Broussonetia papyrifera forgoat in both dry and wet season interactions and Ficus exasperata for goat in both dry and wet season interactions (P>0.05).Thestudy concluded that Broussonetia papyrifera could be a potential feed for both sheep and goats across seasons.The researchrecommended that livestock farmers should incorporate Broussonetia papyrifera feed into their programmes for both sheep andgoats and should be introduced to animals from infancy so that it may become a familiar feed for them.

Island invasion and reinvasion: Informing invasive species management with genetic measures of connectivity

2020 ◽  
Vol 57 (11) ◽  
pp. 2258-2270
Author(s):  
Florian Pichlmueller ◽  
Elaine C. Murphy ◽  
Jamie W. B. MacKay ◽  
John Henderson ◽  
Rachel M. Fewster ◽  
...  
Keyword(s):  
Invasive Species ◽  
Invasive Species Management ◽  
Species Management

scholarly journals Microhabitat of small mammals at ground and understorey levels in a deciduous, southern Atlantic Forest

2013 ◽  
Vol 85 (2) ◽  
pp. 727-736 ◽  
Author(s):  
GERUZA L. MELO ◽  
BARBARA MIOTTO ◽  
BRISA PERES ◽  
NILTON C. CACERES
Keyword(s):  
Habitat Selection ◽  
Small Mammals ◽  
Strong Evidence ◽  
Animal Species ◽  
Deciduous Forest ◽  
Distribution Patterns ◽  
Microhabitat Use ◽  
Southern Brazil ◽  
Different Types ◽  
Didelphis Albiventris

Each animal species selects specific microhabitats for protection, foraging, or micro-climate. To understand the distribution patterns of small mammals on the ground and in the understorey, we investigated the use of microhabitats by small mammals in a deciduous forest of southern Brazil. Ten trap stations with seven capture points were used to sample the following microhabitats: liana, fallen log, ground litter, terrestrial ferns, simple-trunk tree, forked tree, and Piper sp. shrubs. Seven field phases were conducted, each for eight consecutive days, from September 2006 through January 2008. Four species of rodents (Akodon montensis, Sooretamys angouya, Oligoryzomys nigripes and Mus musculus) and two species of marsupials (Didelphis albiventris and Gracilinanus microtarsus) were captured. Captured species presented significant differences on their microhabitat use (ANOVA, p = 0.003), particularly between ground and understorey sites. Akodon montensis selected positively terrestrial ferns and trunks, S. angouya selected lianas, D. albiventris selected fallen trunks and Piper sp., and G. microtarsus choose tree trunks and lianas. We demonstrated that the local small-mammal assemblage does select microhabitats, with different types of associations between species and habitats. Besides, there is a strong evidence of habitat selection in order to diminish predation.

Sign in / Sign up

Export Citation Format

Share Document