Urban forest fragments: Potential refugia to mitigate the effects of urban warming

2016 ◽  
Author(s):  
Lawrence C. Long
Keyword(s):  
Urban Forest ◽  
Forest Fragments ◽  
Urban Warming

Trypanosomatid species in Didelphis albiventris from urban forest fragments

2020 ◽  
Author(s):  
Wesley Arruda Gimenes Nantes ◽  
Filipe Martins Santos ◽  
Gabriel Carvalho de Macedo ◽  
Wanessa Texeira Gomes Barreto ◽  
Luiz Ricardo Gonçalves ◽  
...  
Keyword(s):  
Urban Forest ◽  
Forest Fragments ◽  
Didelphis Albiventris

ESTRUTURA, DIVERSIDADE E HETEROGENEIDADE DO ESTRATO REGENERANTE EM UM FRAGMENTO FLORESTAL URBANO APÓS 10 ANOS DE SUCESSÃO FLORESTAL

FLORESTA ◽  
2015 ◽  
Vol 45 (3) ◽  
pp. 535 ◽  
Author(s):  
Raphaela Vilela Eiras e Paiva ◽  
José Hugo Campos Ribeiro ◽  
Fabricio Alvim Carvalho
Keyword(s):  
Multivariate Analysis ◽  
Species Diversity ◽  
Urban Forest ◽  
Shannon Index ◽  
Forest Fragments ◽  
Ecological Groups ◽  
Small Fragment ◽  
Forest Fragment ◽  
Semideciduous Forest ◽  
Dalbergia Nigra

Este estudo visou avaliar a composição florística, a fitossociologia e a diversidade de espécies do estrato regenerante arbóreo de um pequeno fragmento (0,5 ha) de Floresta Estacional Semidecidual, após 10 anos de abandono, no perímetro urbano do município de Juiz de Fora, MG, Brasil. Os indivíduos da regeneração arbórea (altura ≥ 1 m e DAP < 5 cm) foram amostrados em 25 parcelas aleatórias de 5 x 5 m. Foram amostrados 1224 indivíduos pertencentes a 40 espécies. Houve uma forte predominância (> 90%) de espécies de estágios sucessionais iniciais (pioneiras e secundárias iniciais). Como reflexo da forte dominância ecológica observada, exercida principalmente pela elevada densidade das espécies Dalbergia nigra e Siparuna guianensis, o valor do índice de diversidade de espécies de Shannon (H’ = 2,38) foi muito inferior aos valores encontrados para fragmentos florestais maduros. Mesmo sendo um fragmento pequeno, isolado e em estágio inicial de sucessão secundária, análises multivariadas (agrupamento e DCA) evidenciaram a formação de grupos florísticos e uma forte diferenciação no arranjo das espécies, evidenciando a heterogeneidade típica de florestas tropicais. Embora apresente uma baixa diversidade, esse fragmento urbano tem funções ecológicas e sociais importantes para a região, que carece de áreas verdes para a conservação da flora nativa.AbstractStructure, diversity and heterogeneity of regeneration stratum in an urban forest fragment after 10 years of forest succession. This research aimed to evaluate the floristic composition, phytosociology and species diversity of the regenerating woody stratum of a small fragment (0.5 ha) of Semideciduous Forest, after 10 years of abandonment, in the municipality of Juiz de Fora, MG, Brazil. All woody individuals (height ≥ 1 m dbh <5 cm) were sampled at 25 random plots of 5 x 5 m. We sampled 1224 individuals belonging to 40 species. There was a strong predominance (> 90%) of species of early successional stages (pioneer and early secondary). Reflecting the strong observed ecological dominance, exercised primarily by the high density of the species Dalbergia nigra and Siparuna guianensis, species diversity value (Shannon index H '= 2.38) was much lower than the values found for mature forest fragments in this region. Although a small fragment, isolated and in early stages of secondary succession, the multivariate analysis (cluster and DCA) revealed the formation of distinct floristic groups and a strong differentiation in the arrangement of the species, showing the tropical forests typical heterogeneity. Although it has a low diversity, this urban fragment has ecological and social importance to the region, that present lack of green areas to conserve the native flora.Keywords:  Phytosociology; multivariate analysis; gradient analysis; ecological groups.

Resources and conservation of neotropical butterflies in urban forest fragments

1993 ◽  
Vol 64 (1) ◽  
pp. 3-9 ◽  
Author(s):  
Jaqueline J.S. Rodrigues ◽  
Keith S. Brown ◽  
Alexandre Ruszczyk
Keyword(s):  
Urban Forest ◽  
Forest Fragments

Pouteria kossmanniae (Sapotaceae): a new species from Central Amazonia, Brazil

Phytotaxa ◽  
2020 ◽  
Vol 447 (4) ◽  
pp. 265-275
Author(s):  
CAROLINE C. VASCONCELOS ◽  
MARISABEL U. ADRIANZÉN ◽  
JOSÉ LUÍS C. CAMARGO ◽  
MÁRIO H. TERRA-ARAUJO
Keyword(s):  
New Species ◽  
Near Infrared ◽  
Urban Forest ◽  
Conservation Status ◽  
Similar Species ◽  
Forest Fragments ◽  
Terra Firme ◽  
Central Amazonia ◽  
Pouteria Macrophylla ◽  
A New Species

Pouteria kossmanniae (Sapotaceae, Chrysophylloideae), a new species from Central Amazonia, is here described. It is known from the Manaus region, Amazonas, Brazil, and is found in non-flooded upland forests, known as terra firme. Illustrations are provided in addition to geographic distribution, with a comparison of the morphological and spectral (near-infrared) differences between P. kossmanniae and its very similar species Pouteria macrophylla, Pouteria manaosensis, and Pouteria rodriguesiana. The species is naturally common in some urban forest fragments, but since only a low number of subpopulations is known, we assign P. kossmanniae the preliminary conservation status of “Endangered”.

scholarly journals Conifer growth and reproduction in urban forest fragments: Predictors of future responses to global change?

2012 ◽  
Vol 15 (4) ◽  
pp. 879-891 ◽  
Author(s):  
Anna M. O’Brien ◽  
Ailene K. Ettinger ◽  
Janneke HilleRisLambers
Keyword(s):  
Global Change ◽  
Urban Forest ◽  
Forest Fragments ◽  
Growth And Reproduction

scholarly journals Floristic Composition and Community Structure of Epiphytic Angiosperms in an Urban Forest Fragment in the Eastern Amazon

2021 ◽  
Vol 3 (4) ◽  
Author(s):  
Josélia Rozanny Vieira Pacheco ◽  
Felipe Fajardo Villela Antolin Barberena
Keyword(s):  
Community Structure ◽  
Urban Forest ◽  
Diversity Index ◽  
Species Conservation ◽  
Floristic Composition ◽  
Neotropical Region ◽  
Forest Fragments ◽  
Forest Fragment ◽  
Importance Value ◽  
Vascular Epiphytes

Vascular epiphytes are one of the most important forest components, contributing to microclimatic maintenance. These plants find ideal conditions for development in the Amazon due to the spatial heterogeneity and high temperature and humidity typical of this biome. In recent years, the Brazilian Amazon has undergone dramatic changes in its landscape, mainly due to the increase in deforestation and fire rates. We present here the floristic composition and analyze the community structure of epiphytic angiosperms of an urban forest fragment in Eastern Amazon. A total of 71 epiphytic individuals were recorded belonging to eight species and four families. Orchidaceae was the most representative family, corroborating the pattern for surveys of epiphytic diversity in the Neotropical region. Epiphytic species were found on 24 individuals of 10 tree species. The epiphytic importance value (IVe) was low for all species, except for Aechmea tocantina and Rhipsalis baccifera. Cactaceae was the family with the highest IVe. Most epiphytes were found in the crown of trees (83.1%). The diversity index of the fragment was H’ = 1.80 and the equity index was J= 0.87, reflecting the absence of highly dominant species. Conservation of urban forest fragments is necessary for the maintenance of epiphytic flora and ecosystem services.

scholarly journals Ground spiders (Arachnida, Araneae) associated with urban forest fragments in southern Amazon

2020 ◽  
Vol 20 (4) ◽  
Author(s):  
Genefer E. R. dos Santos ◽  
Kleber Solera ◽  
Cristiano A. da Costa ◽  
Marinêz I. Marques ◽  
Antonio D. Brescovit ◽  
...  
Keyword(s):  
Species Richness ◽  
Urban Areas ◽  
Rainy Season ◽  
Urban Forest ◽  
Total Sample ◽  
Amazon Region ◽  
Forest Fragments ◽  
Human Occupation ◽  
Mato Grosso ◽  
Spider Abundance

Abstract: Forest fragments in urban areas comprise important habitats for a wide variety of species, however, conservationist policies for their maintenance and conservation are still incipient. This study examined the richness and abundance of the ground-spider assemblage in five forest fragments, with areas ranging between 18.5 and 103.98 ha, in the urban perimeter of Sinop, northern Mato Grosso State, southern Amazon region of Brazil. Sampling was carried out using the mini-Winkler extractor and pitfall traps in the dry (July) and rainy (November) seasons of 2017. All fragments were characterized in relation to the area and the Index of Biotic Integrity (IBI), to assess the effect of these variables on richness and abundance of soil spider assemblage. A total of 653 spiders were sampled, corresponding to 25 families and 52 species. Salticidae, Theridiidae, Lycosidae, Linyphiidae, Oonopidae and Symphytognathidae were the most abundant families (63.3% of the total sample). The assemblage was characterized by the dominance of hunting spiders (393 ind.; 60.2%) over web-building spiders (260 ind.; 39.8%). Greater spider abundance and richness was obtained during the rainy season (517 ind.; 79.2%; 41 spp.) as compared with the dry season (136 ind.; 20.8%; 24 spp.). Only 13 species occurred in dry and rainy season. Two species were recorded for the first time in the Amazon region, namely, Anapistula aquytabueraRheims & Brescovit, 2003 (Symphytognathidae) and Opopaea concolor (Blackwall, 1859) (Oonopidae). Species richness was not affected by IBI and area of fragment. Although the statistical model is not significant, species richness increases slightly with IBI and area of fragment. Similarly, abundance of spiders was not affected by IBI and area of fragment. Regardless of the area size, all evaluated forest fragments showed a low and regular IBI, demonstrating that these habitats have suffered with the pressures inherent from the urban perimeter, including the constant expansion of human occupation as well as misuse by the population. Nonetheless, these same fragments revealed considerable richness of species of ground spiders and can thus be categorized as important habitats for the maintenance of regional biodiversity. Therefore, action strategies must be set out to ensure their conservation.

scholarly journals Urban forest fragments as unexpected sanctuaries for the rare endemic ghost butterfly from the Atlantic forest

2019 ◽  
Vol 9 (18) ◽  
pp. 10767-10776 ◽  
Author(s):  
Antonio C. Andrade ◽  
William Medeiros ◽  
Matthew Adams
Keyword(s):  
Atlantic Forest ◽  
Urban Forest ◽  
Forest Fragments ◽  
Rare Endemic

Response of avian communities to invasive vegetation in urban forest fragments

The Condor ◽  
2014 ◽  
Vol 116 (3) ◽  
pp. 459-471 ◽  
Author(s):  
Sarah C. Schneider ◽  
James R. Miller
Keyword(s):  
Urban Forest ◽  
Forest Fragments ◽  
Avian Communities
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