scholarly journals Integrating agricultural expansion into conservation biogeography: conflicts and priorities

2014 ◽  
Vol 6 (2) ◽  
Author(s):  
Ricardo Dobrovolski
Keyword(s):  
Agricultural Expansion ◽  
Conservation Biogeography

Global agricultural expansion and carnivore conservation biogeography

2013 ◽  
Vol 165 ◽  
pp. 162-170 ◽  
Author(s):  
Ricardo Dobrovolski ◽  
Rafael D. Loyola ◽  
François Guilhaumon ◽  
Sidney F. Gouveia ◽  
José Alexandre F. Diniz-Filho
Keyword(s):  
Agricultural Expansion ◽  
Conservation Biogeography ◽  
Carnivore Conservation

scholarly journals Conservation biogeography of the Cerrado's wild edible plants under climate change: Linking biotic stability with agricultural expansion

2015 ◽  
Vol 102 (6) ◽  
pp. 870-877 ◽  
Author(s):  
G. de Oliveira ◽  
M. S. Lima-Ribeiro ◽  
L. C. Terribile ◽  
R. Dobrovolski ◽  
M. P. d. C. Telles ◽  
...  
Keyword(s):  
Climate Change ◽  
Wild Edible Plants ◽  
Agricultural Expansion ◽  
Edible Plants ◽  
Conservation Biogeography ◽  
Biotic Stability

scholarly journals Spatial Analysis of the Drivers, Characteristics, and Effects of Forest Fragmentation

2021 ◽  
Vol 13 (6) ◽  
pp. 3246
Author(s):  
Zoe Slattery ◽  
Richard Fenner
Keyword(s):  
Forest Fragmentation ◽  
Forest Fires ◽  
Geographical Information ◽  
Agricultural Expansion ◽  
Forest Patches ◽  
Mato Grosso ◽  
Remote Imaging ◽  
Landscape Characteristics ◽  
High Level

Building on the existing literature, this study examines whether specific drivers of forest fragmentation cause particular fragmentation characteristics, and how these characteristics can be linked to their effects on forest-dwelling species. This research uses Landsat remote imaging to examine the changing patterns of forests. It focuses on areas which have undergone a high level of a specific fragmentation driver, in particular either agricultural expansion or commodity-driven deforestation. Seven municipalities in the states of Rondônia and Mato Grosso in Brazil are selected as case study areas, as these states experienced a high level of commodity-driven deforestation and agricultural expansion respectively. Land cover maps of each municipality are created using the Geographical Information System software ArcGIS Spatial Analyst extension. The resulting categorical maps are input into Fragstats fragmentation software to calculate quantifiable fragmentation metrics for each municipality. To determine the effects that these characteristics are likely to cause, this study uses a literature review to determine how species traits affect their responses to forest fragmentation. Results indicate that, in areas that underwent agricultural expansion, the remaining forest patches became more complex in shape with longer edges and lost a large amount of core area. This negatively affects species which are either highly dispersive or specialist to core forest habitat. In areas that underwent commodity-driven deforestation, it was more likely that forest patches would become less aggregated and create disjunct core areas. This negatively affects smaller, sedentary animals which do not naturally travel long distances. This study is significant in that it links individual fragmentation drivers to their landscape characteristics, and in turn uses these to predict effects on species with particular traits. This information will prove useful for forest managers, particularly in the case study municipalities examined in this study, in deciding which species require further protection measures. The methodology could be applied to other drivers of forest fragmentation such as forest fires.

scholarly journals Remarkable Population Resilience in a North African Endemic Damselfly in the Face of Rapid Agricultural Transformation

Insects ◽  
2021 ◽  
Vol 12 (4) ◽  
pp. 353
Author(s):  
Rassim Khelifa ◽  
Hayat Mahdjoub ◽  
Affef Baaloudj ◽  
Robert A. Cannings ◽  
Michael J. Samways
Keyword(s):  
Land Cover ◽  
Agricultural Land ◽  
Large Population ◽  
Agricultural Practices ◽  
Agricultural Expansion ◽  
North African ◽  
Natural Habitats ◽  
Agricultural Transformation ◽  
The Face ◽  
Terrestrial Habitats

Agriculture can be pervasive in its effect on wild nature, affecting various types of natural habitats, including lotic ecosystems. Here, we assess the extent of agricultural expansion on lotic systems in Northern Africa (Algeria, Tunisia, and Morocco) and document its overlap with the distribution of an endemic damselfly, Platycnemis subdilatata Selys, using species distribution modeling. We found that agricultural land cover increased by 321% in the region between 1992 and 2005, and, in particular, the main watercourses experienced an increase in agricultural land cover from 21.4% in 1992 to 78.1% in 2005, together with an increase in the intensity of 226% in agricultural practices. We used capture–mark–recapture (CMR) surveys in terrestrial habitats surrounding a stream bordered by grassland and cropland in northeastern Algeria to determine demographic parameters and population size, as well as cropland occupancy. CMR modeling showed that the recapture and survival probabilities had an average of 0.14 (95%CI: 0.14–0.17) and 0.86 (0.85–0.87), respectively. We estimated a relatively large population of P. subdilatata (~1750 individuals) in terrestrial habitats. The occupancy of terrestrial habitats by adults was spatially structured by age. Our data suggest that P. subdilatata has survived agricultural expansion and intensification better than other local odonate species, mainly because it can occupy transformed landscapes, such as croplands and grasslands.

scholarly journals Flora of Espírito Santo: Psidium (Myrtaceae)

Rodriguésia ◽  
2017 ◽  
Vol 68 (5) ◽  
pp. 1791-1805 ◽  
Author(s):  
Amélia C. Tuler ◽  
Tatiana T. Carrijo ◽  
Márcia F.S. Ferreria ◽  
Ariane L. Peixoto
Keyword(s):  
Species Richness ◽  
Protected Areas ◽  
Sea Level ◽  
The State ◽  
Agricultural Expansion ◽  
Herbarium Specimens ◽  
Espírito Santo ◽  
Lowland Forests ◽  
Atlantic Rainforest Biome ◽  
Espirito Santo

Abstract This study presents a floristic-taxonomic treatment of Psidium in the state of Espírito Santo, and is a result of fieldwork combined with analyses of herbarium specimens. Fourteen species of the genus were recognized in Espírito Santo state (P. brownianum, P. cattleianum, P. cauliflorum, P. guajava, P. guineense, P. longipetiolatum, P. myrtoides, P. oblongatum, P. oligospermum, P. ovale, P. rhombeum, P. rufum P. sartorianum, and Psidium sp.), accounting for about 34% of the species richness estimated for the genus in the Atlantic Rainforest biome. The species occur predominantly in lowland forests up to 700 meters above sea level. These areas are highly threatened due to urbanization of coastal areas and agricultural expansion in the state Espírito Santo. Therefore, the conservation of Psidium species in this state requires the creation of more lowland protected areas.

scholarly journals The genus Allomyces (Blastocladiomycota) in the State of Piauí, Brazil

Hoehnea ◽  
2016 ◽  
Vol 43 (3) ◽  
pp. 487-495
Author(s):  
José de Ribamar de Sousa Rocha ◽  
Laércio de Sousa Saraiva ◽  
Janete Barros da Silva ◽  
Maria do Amparo de Moura Macêdo
Keyword(s):  
Geographical Distribution ◽  
Soil Samples ◽  
The State ◽  
Agricultural Expansion ◽  
Zoosporic Fungi ◽  
Identification Procedures

ABSTRACT Brazilian ecosystems have been intensively exploited for agricultural expansion, however, the diversity of zoosporic organisms in such biomes remains little known. Therefore, further research is required to better understand their role within these ecosystems. Studies with zoosporic fungi were carried out and 22 Allomyces isolates were obtained from soil samples collected at six municipalities from Piauí State. After identification procedures, the taxa were grouped into four species: A. anomalus R. Emers., A. arbusculus E.J. Butler, A. moniliformis Coker & Braxton, and A. neomoniliformis Indoh. A. arbusculus had the highest rate of resistant sporangia viability (10%) and the largest geographical distribution in Piauí, occurring in seven out of ten sites studied. Countrywide, they occur within 14 municipalities from three states. Greater knowledge about the geographical distribution of Allomyces in Brazil is being pioneered in the State of Piauí. Novel information regarding the diversity and occurrence, as well as taxonomic characteristics of the isolates is presented herein.

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