Mustard plants distant from forest fragments receive a lower diversity of flower-visiting insects

Devkota, Kedar; Santos, Charles Fernando dos; Blochtein, Betina

doi:10.1016/j.baae.2020.05.005

Cited by 6 publications

(2 citation statements)

References 50 publications

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“…Ecological diversity indices were determined using the Vegan package for R. 15 , based on data from the 2 years combined. These were the species richness index (S), the Shannon index (H), the dominance index (D), the Pielou equitability index (J) and the Jaccard index (I) 16 – 18 . The species richness index (S) represents the number of species in a community, regardless of their relative abundance.…”

Section: Methodsmentioning

confidence: 99%

Annual and geographical variations in the specific composition of jassids and their damage on cotton in Ivory Coast

Kouadio,

Kouakou,

Bini

et al. 2024

Sci Rep

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In recent years, jassids have become a real problem for cotton growing in Ivory Coast. It is important to investigate the causes of this problem. The aim of this study was to highlight the diversity of jassid species and their impact on cotton growing in Ivory Coast. The collections carried out in 2021 identified three species. Jacobiasca lybica (Bergevin & Zanon, 1922) is the most abundant, with proportions ranging from 73.3 to 93.3% depending on the site. The other two species are Empoasca papayae (Oman, 1937) (8.3%) and Empoasca facialis (Jacobi, 1912) (5%). In 2022, collections revealed the invasion of a new species, Amrasca biguttula (Shiraki, 1913), which became dominant with proportions of 90 to 100% depending on the site. Two other species, Jacobiasca lybica (Bergevin & Zanon, 1922) (2.7%) and Empoasca facialis (Jacobi, 1912) (1.3%), cohabit with Amrasca biguttula (Shiraki, 1913). Thus, while the damage noted in 2021 was attributable to Jacobiasca lybica (Bergevin & Zanon, 1922), that observed in 2022 is essentially due to Amrasca biguttula (Shiraki, 1913), with incidences exceeding the economic impact threshold. The North-East of the cotton basin was the area most affected by attacks by these two species. The results of the study reveal significant changes in jassid species composition and climatic conditions in the cotton-growing areas of Ivory Coast, from 1 year to the next. This situation also explains the variations in damage levels.

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Section: Methodsmentioning

confidence: 99%

Annual and geographical variations in the specific composition of jassids and their damage on cotton in Ivory Coast

Kouadio,

Kouakou,

Bini

et al. 2024

Sci Rep

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“…The sampling effectiveness effort was tested to evaluate the sufficiency of sampling [31]; the sufficient sampling effort captures about ≥80% of estimated species richness [6]. The species richness estimate was performed using a bootstrapping technique [30].…”

Section: Species Richness In Different Land-usesmentioning

confidence: 99%

Conservation of Tree Species Richness in a Traditional Agroforestry Landscape in the Vhembe Biosphere Reserve, South Africa

Makhubele

Chirwa

Sheppard

et al. 2022

Forests

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Tree species richness is a critical element concerning trees on farms, on communal land and in protected areas to support biodiversity and socio-economic livelihoods in traditional agroforestry landscapes. Tree species richness is directly linked to the use of provisioning ecosystem services and to management practices in traditional agroforestry landscapes. The study aimed to investigate the link between socio-ecological and conservation strategies regarding tree species richness in traditional agroforestry landscapes. The study was conducted in the Damani, Thenzheni, Tshiombo and Tshipako villages located in Thulamela Municipality of the Vhembe Biosphere Reserve, South Africa. The data were collected using a mixed method approach combining forestry inventory and focus group discussion. The study recorded a total number of 126 tree species: 83 communal-land-hosted species, 68 species of trees on farms and 81 species in the protected areas. The indigenous species Englerophytum magalismontanum (Sond.) T.D.Penn. was the most cited (62%) by interviewees, with a primary use for wild fruits, followed by Pteleopsis myrtifolia (M.A. Lawson) Engl. & Diels. (57%) for fuelwood, Combretum molle R.Br. ex G.Don (36%) for traditional medicine and Albizia adianthifolia (Schumach.) W.F.Wight (12%) for fodder. Species richness was found to be commonly driven by provisioning ecosystem services with trees on farms and on communal land. Distance was found to be major driving factor of species richness in protected areas. This study found that the local people have no conservation strategy and practices targeting the enhancement of tree species richness in the traditional agroforestry landscape. This study advocates for the establishment of a conservation strategic framework for restoring tree species richness by targeting traditional agroforestry landscapes.

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Harvesting distance effect on tree species diversity in traditional agroforestry landscape: a case of Vhembe Biosphere Reserve in South Africa

2023

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Traditional agroforestry has been recognised to contribute to biodiversity conservation; however, biodiversity strategies often lack information about drivers of tree species diversity loss, which is crucial for decision-making. Anthropogenic disturbance has positive and negative effects on tree species richness and diversity. This study was conducted in Vhembe Biosphere Reserve, Limpopo Province, and used distance from the nucleus of the community to the forest as a parameter to assess tree species richness and diversity. Vegetation data were collected using three transects of 150 m in each distance level and sampled a total area of 1000 m2 by sampling five rectangular plots of 20 m2 × 10 m2 (200 m2). Data analysis was conducted using Chao1, PERMANOVA, nMDS, PERMDISP, DISTLIM, dbRDA and SIMPER. The findings are in consonant with distance decay of community similarity hypotheses, with estimated tree species richness of 76, 93 and 95 species in an immediate distance, intermediate distance and far distance, respectively. Moreover, the highest species variation was observed at an intermediate distance, which indicates that there is greater species composition at an intermediate distance compared to immediate and far distances. The results confirm that the distance and associated factors have major detrimental effects on tree species richness and biodiversity in traditional agroforestry landscapes. Harvesting of provisioning ecosystem services is found and known to be extremely high in the study area. Effective interventions such as planting indigenous trees and conserving the existing vegetation must be implemented to reduce and halt overexploitation.

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Mustard plants distant from forest fragments receive a lower diversity of flower-visiting insects

Cited by 6 publications

References 50 publications

Annual and geographical variations in the specific composition of jassids and their damage on cotton in Ivory Coast

Annual and geographical variations in the specific composition of jassids and their damage on cotton in Ivory Coast

Conservation of Tree Species Richness in a Traditional Agroforestry Landscape in the Vhembe Biosphere Reserve, South Africa

Harvesting distance effect on tree species diversity in traditional agroforestry landscape: a case of Vhembe Biosphere Reserve in South Africa

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