scholarly journals Soil macrofauna under different land uses in the Colombian Amazon

2018 ◽  
Vol 53 (12) ◽  
pp. 1383-1391 ◽  
Author(s):  
Leonardo Rodríguez Suárez ◽  
Yuli Tatiana Paladines Josa ◽  
Erika Judith Astudillo Samboni ◽  
Karla Dayana Lopez Cifuentes ◽  
Ervin Humprey Durán Bautista ◽  
...  

Abstract: The objective of this work was to evaluate the soil macrofauna and the bioindicator taxonomic groups associated with different land uses in the Colombian Amazon. Twelve agroforestry arrangements were studied and compared with to the native forest and pasture. For each land use, six monoliths were randomly selected and divided into four layers (litter, and 0-10, 10-20, and 20-30 cm soil depths). The variables considered in the analysis of land use effects were: individuals per square meter, order richness, Shannon’s diversity index, and Pielou’s evenness index. The greatest values for soil macrofauna density and diversity occurred in the forest, in contrast with the pasture. The principal component analysis distinguished land use according to macrofauna diversity, separating the native forest from the other land uses. The cluster analysis indicated the potential of some agroforestry systems to conserve the values of soil macrofauna density and diversity similar to those of the forest. According to the analysis of indicator value, five taxonomic groups (Diplura, Pseudoscorpionida, Araneae, Chilopoda, and Gastropoda), identified as bioindicators, are associated with preserved sites because of the sensitivity of their populations.


2017 ◽  
Vol 65 (4) ◽  
pp. 217 ◽  
Author(s):  
Andy Darmawan ◽  
Tri Atmowidi ◽  
Wasmen Manalu ◽  
Bambang Suryobroto

The conversion of natural forest to agroforestry plantations and annual cropping systems alters the soil habitat and food resources for biota, including earthworms. Native earthworm species may disappear whereas exotic species with greater tolerance of disturbance and less niche specialisation may thrive. The objective of the study was to compare the earthworm diversity in managed forest and agroforestry systems, which were cultivated for mixed plantation and annual crop production on Mount Gede, Indonesia. All the habitats in the study area were impacted by humans. The forest habitat was a managed forest, with a permanent tree cover, whereas mixed plantation had a partial shrub cover. Meanwhile, homogenous plantation was cultivated with annual crops. Among 3787 individuals collected during July–October 2012, five Oriental earthworm species were identified in the soil communities of Mount Gede: Drawida nepalensis, Notoscolex javanica, Pheretima pura-group, Polypheretima moelleri, and Polypheretima sempolensis. Also, 18 species were found that are reported to be non-Oriental in origin. Anthropogenic disturbance of forests on Mount Gede, due to conversion into plantations, alters the earthworm environment by increasing soil water content, temperature and total phosphorous content, while decreasing organic carbon. N. javanica was the only native species to survive this deforestation, while the exotic Ocnerodrilus occidentalis and Pontoscolex corethrurus thrived, becoming the eudominant species. From the forest area to the mixed and homogenous plantations, the predicted decreasing diversity is evidenced by the lowering trend of Shannon’s diversity index. In conclusion, the land-use change into mixed plantations and annual croplands has reduced earthworm diversity in this region of Mount Gede, Indonesia.



2021 ◽  
Author(s):  
◽  
Leo Mercer

<p>This research explores landowner preferences for various land use options suitable for Māori land in Te Tairāwhiti, on the East Coast of the North Island of Aotearoa-New Zealand (henceforth Aotearoa). A particular emphasis is placed on the applicability and feasibility of native forest carbon farming within the New Zealand Emissions Trading Scheme (NZ ETS) and opportunities, barriers and risks associated with this land use. Alongside this focus, is a wider investigation into the socio-cultural, environmental and economic co-benefits Māori landowners associate with traditional and emerging land uses in Te Tairāwhiti. This study uses a transformative research approach that is rooted in the spirit of kaupapa Māori research.  Some 90 percent of Māori land in Te Tairāwhiti has severe limitations which restrict land use options to plantation forestry or pastoral farming for most landowners. A response to these limitations, and a land development option favoured by government agencies, and the academy, is for ‘unproductive’ Māori land to be retired into permanent native forest carbon sinks – a solution frequently proffered as a positive means to address national climate change commitments and local environmental and socioeconomic issues. Whilst these objectives, and the land use preferences of Māori seemingly converge, the wider history of land loss and alienation influences perceptions of fairness and equity for Māori landowners who may feel pressured by the lack of attractive land use options to establish permanent carbon sinks, which can effectively constrain land use options for future generations.  Through case study analysis of a Māori sheep and beef farming incorporation participating in the NZ ETS, this study suggests an economic case for carbon farming in Te Tairāwhiti. However, institutional and socio-cultural barriers hinder the participation of Māori landowners in the NZ ETS. The second focus of this thesis has been an investigation into how native forest carbon farming is viewed when compared to other novel and existing land uses suitable for Māori land in the Waiapu catchment (a highly erodible catchment in Te Tairāwhiti). Interviews with key informants were employed to curate a set of land use options for Māori landowners to appraise, using multi-criteria analysis, at two wānanga. Four land use models were created for appraisal by 16 Māori landowner participants. The strength of association between a co-benefit and a land use was collectively deliberated upon in each of these models, and ratings were assigned to reflect this association. These ratings have aided in assessing the wider value of land uses for Māori in the region.   The results from this research indicate an overwhelming preference for native forests when compared to other suitable land uses. Native forests are most closely associated with environmental co-benefits (erosion control, water quality, biodiversity and withstanding and limiting climate change) and social and cultural co-benefits (skills development, employment, reconnecting with the land, and self-determination/autonomy). The strong performance of native forestry stands in stark contrast with other land uses under consideration such as exotic forestry (Pinus radiata within the study scenario) and sheep and beef farming which occupy the majority of ‘productive’ land in Te Tairāwhiti. Exotic forestry and sheep and beef farming are associated with few benefits beyond employment and skills development. There is also a clear perception in the quantitative and qualitative data that these uses disconnect Māori landowners from their land and reduce the ability of communities to be self-reliant.   Interestingly, other novel land uses under consideration such as perennial horticulture (including blueberries, macadamia nuts and apples), medicinal cannabis and hemp, and hunting and tourism were also valued more than exotic forestry and sheep and beef farming. These results indicate that existing land uses, sometimes implemented without express input from local communities, are now the least preferred land uses. In addition, novel and untested land uses such as medicinal cannabis and hemp, which do not exist at any scale in the region, are preferred over existing uses - even when there is scant evidence of success at any scale.   These results push back at the prevailing Pākehā dominated orthodoxy, which has existed from the early days of colonisation and holds that monoculture land uses, for profit above all else, are best suited to the land and the people. It is clear, from this study, that Māori landowners wish to move back to a vibrant multi-faceted land use regime – exemplified by diversity over homogeneity – that characterised the pre-colonisation Māori economy. This research accordingly introduces and explores a value articulating process that increases understanding of the aspirations and values of Māori landowners, and can assist Māori in progressing their land use futures.</p>



2021 ◽  
Author(s):  
◽  
Leo Mercer

<p>This research explores landowner preferences for various land use options suitable for Māori land in Te Tairāwhiti, on the East Coast of the North Island of Aotearoa-New Zealand (henceforth Aotearoa). A particular emphasis is placed on the applicability and feasibility of native forest carbon farming within the New Zealand Emissions Trading Scheme (NZ ETS) and opportunities, barriers and risks associated with this land use. Alongside this focus, is a wider investigation into the socio-cultural, environmental and economic co-benefits Māori landowners associate with traditional and emerging land uses in Te Tairāwhiti. This study uses a transformative research approach that is rooted in the spirit of kaupapa Māori research.  Some 90 percent of Māori land in Te Tairāwhiti has severe limitations which restrict land use options to plantation forestry or pastoral farming for most landowners. A response to these limitations, and a land development option favoured by government agencies, and the academy, is for ‘unproductive’ Māori land to be retired into permanent native forest carbon sinks – a solution frequently proffered as a positive means to address national climate change commitments and local environmental and socioeconomic issues. Whilst these objectives, and the land use preferences of Māori seemingly converge, the wider history of land loss and alienation influences perceptions of fairness and equity for Māori landowners who may feel pressured by the lack of attractive land use options to establish permanent carbon sinks, which can effectively constrain land use options for future generations.  Through case study analysis of a Māori sheep and beef farming incorporation participating in the NZ ETS, this study suggests an economic case for carbon farming in Te Tairāwhiti. However, institutional and socio-cultural barriers hinder the participation of Māori landowners in the NZ ETS. The second focus of this thesis has been an investigation into how native forest carbon farming is viewed when compared to other novel and existing land uses suitable for Māori land in the Waiapu catchment (a highly erodible catchment in Te Tairāwhiti). Interviews with key informants were employed to curate a set of land use options for Māori landowners to appraise, using multi-criteria analysis, at two wānanga. Four land use models were created for appraisal by 16 Māori landowner participants. The strength of association between a co-benefit and a land use was collectively deliberated upon in each of these models, and ratings were assigned to reflect this association. These ratings have aided in assessing the wider value of land uses for Māori in the region.   The results from this research indicate an overwhelming preference for native forests when compared to other suitable land uses. Native forests are most closely associated with environmental co-benefits (erosion control, water quality, biodiversity and withstanding and limiting climate change) and social and cultural co-benefits (skills development, employment, reconnecting with the land, and self-determination/autonomy). The strong performance of native forestry stands in stark contrast with other land uses under consideration such as exotic forestry (Pinus radiata within the study scenario) and sheep and beef farming which occupy the majority of ‘productive’ land in Te Tairāwhiti. Exotic forestry and sheep and beef farming are associated with few benefits beyond employment and skills development. There is also a clear perception in the quantitative and qualitative data that these uses disconnect Māori landowners from their land and reduce the ability of communities to be self-reliant.   Interestingly, other novel land uses under consideration such as perennial horticulture (including blueberries, macadamia nuts and apples), medicinal cannabis and hemp, and hunting and tourism were also valued more than exotic forestry and sheep and beef farming. These results indicate that existing land uses, sometimes implemented without express input from local communities, are now the least preferred land uses. In addition, novel and untested land uses such as medicinal cannabis and hemp, which do not exist at any scale in the region, are preferred over existing uses - even when there is scant evidence of success at any scale.   These results push back at the prevailing Pākehā dominated orthodoxy, which has existed from the early days of colonisation and holds that monoculture land uses, for profit above all else, are best suited to the land and the people. It is clear, from this study, that Māori landowners wish to move back to a vibrant multi-faceted land use regime – exemplified by diversity over homogeneity – that characterised the pre-colonisation Māori economy. This research accordingly introduces and explores a value articulating process that increases understanding of the aspirations and values of Māori landowners, and can assist Māori in progressing their land use futures.</p>



2021 ◽  
Author(s):  
Susan Crow ◽  
Hannah Hubanks ◽  
Jonathan Deenik ◽  
Tai Maaz ◽  
Christine Tallamy Glazer ◽  
...  

Abstract Soil health conceptualized as a measurable ecosystem property provides a powerful tool for monitoring progress in restoration projects or implementation of best management practices to promote sustainable agroecosystems. We surveyed soils collected from a range of land uses (i.e., protected native and non-native forest, managed pasture, unmanaged previously intensive agricultural lands, organic cropland, and conventional cropland) across a range of soil orders (Oxisol, Mollisol, Andisol, Inceptisol, and Vertisol) on three Hawaiian Islands. Forty-six metrics associated with soil health and encompassing biological, chemical, and physical properties were measured. In this multivariate survey, the most distinct group was the unmanaged, previously intensive agriculture lands, which was significantly different from all other land uses regardless of mineralogy. Importantly, the soil health of well-managed pastures in Hawaiʻi was not different from protected forests, suggesting that well-managed grazing lands may be as healthy and resilient as protected forests. A suite of 11 readily measured parameters emerged out of a first-principle approach to determining a holistic indication of soil health across a range of soils and systems in Hawaiʻi encompassing much of the diversity in the tropics and subtropics. Every land use may improve its soil health status within a reasonable range of expectations for a soil’s land use history, current land use, and mineralogy. Key drivers of the measures for soil health, including intensive land use history, current land use practices, and mineralogy, must be interwoven into the soil health index, which should set minimum and maximum benchmarks and weight parameters according to equitable standards.



2021 ◽  
Vol 82 (1) ◽  
Author(s):  
Belayneh Bufebo ◽  
Eyasu Elias ◽  
Emana Getu

Abstract Background Land use can exert a strong influence on the abundance, diversity, and community composition of soil macro-fauna. This study was conducted to evaluate the effects of four land use types on the abundance and diversity of soil invertebrate macro-fauna communities. These land uses include forest land, grazing land, crop cultivated outfields, and homestead garden fields present at Shenkolla watershed, south central Ethiopia. Monolith sampling of soil macro-fauna was done according to the standard of Tropical Soils Biology and Fertility Institute (TSBF) procedure. Five sampling points were chosen in each land use type and small monolith (25 × 25 × 30 cm) was dug out at 5-m interval along a transect with randomly positioned starting point, but perpendiculars to the slope. A total of 20 monoliths (4 treatments × 5 replications) were taken across all the land use types. Sampling of SIMF was carried out in April 2019 where soil macro-faunas are known to be more active. To evaluate the SIMF community eight parameters were measured: Shannon-Wiener index, Simpson diversity index, Pielou’s measure of evenness, Margalef’s diversity index, the Number of Occurrence Index, Relative abundance, Density (individuals per square meter) of each taxon and density of all SIMF and Bray-Curtis similarity index. The data were further analyzed using ANOVA and a general linear model to determine the variation and the influence of land use type, respectively. Results In general, 332 individuals, 10 orders, 12 families, and 15 species were identified, from the collected samples. There were significant differences (p < 0.05) among the four land use types for SIMF except wireworm, spiders, and millipedes. Overall abundance and diversity were lowest in the crop cultivated outfields and highest in homestead garden fields and forest land. Bray-Curtis’ similarity was highest between the sampled sites s16 and s19 with in the forest land, and lowest (2%) between sites s1 (crop cultivated out fields) and s14 (homestead garden fields). Conclusion The results revealed that the diversity of SIMF was positively influenced by forest land and homestead garden fields and negatively influenced in grazing land and cultivated outfields. Therefore, maintenance of a continuous litter cover at the surface and application of a wide range of organic fertilizers (farmyard manure, household refuse, and compost) is very much critical to prevent the decrease in diversity of SIMF.



2020 ◽  
Vol 11 (2) ◽  
pp. 127-135
Author(s):  
Mujiyo MUJIYO ◽  
Suntoro SUNTORO ◽  
Restu Prasetyaning TYAS ◽  
Aktavia HERAWATI ◽  
Hery WIDIJANTO

Soil quality is closely related to environment because soil is not only viewed as a growing media for plants but also encompasses various environmental and health functions. It is important to know the quality of soil in order to keep it healthy, productive, and optimally functioning. This research aims to evaluate soil quality status in various land uses and to learn the land factors that are related to soil quality. Soil quality index (SQI) represents the soil quality status. SQI will then be used as the basis for soil management. A descriptive explorative research study was carried out in the Giritontro Sub-district, Wonogiri District, Indonesia. SQI indicators were obtained from 12 existing Land Mapping Units (LMU). SQI was obtained by determining the Minimum Data Set (MDS) with a Principal Component Analysis (PCA) test. Then SQI was mapped and statistically analyzed to determine the influence of land use and the determinant factors of SQI. Results showed that SQI in all area is class 3 or moderate. SQI was significantly influenced by land use. SQI in paddy field is 9.09% higher than crop fields and 2.27% higher than of plantations. Indicators which are significantly related to SQI are bulk density, porosity, cation exchange capacity, available P, available K and microbial biomass carbon (MBC). The type of soil management that can be implemented to improve soil quality includes addition of organic or inorganic fertilizer and adoption of an agroforestry system.



PLoS ONE ◽  
2021 ◽  
Vol 16 (8) ◽  
pp. e0255669
Author(s):  
Adriana M. Silva-Olaya ◽  
Dúber A. Mora-Motta ◽  
Maurício R. Cherubin ◽  
Daniel Grados ◽  
Anil Somenahally ◽  
...  

Soil enzymes mediate key processes and functions of the soils, such as organic matter decomposition and nutrient cycling in both natural and agricultural ecosystems. Here, we studied the activity of five extracellular soil enzymes involved in the C, N, and P-mineralizing process in both litter and surface soil layer of rainforest in the northwest region of the Colombian Amazon and the response of those soil enzymes to land use change. The experimental study design included six study sites for comparing long-term pasture systems to native forest and regeneration practices after pasture, within the main landscapes of the region, mountain and hill landscapes separately. Results showed considerable enzymatic activity in the litter layer of the forest, highlighting the vital role of this compartment in the nutrient cycling of low fertility soils from tropical regions. With the land use transition to pastures, changes in soil enzymatic activities were driven by the management of pastures, with SOC and N losses and reduced absolute activity of soil enzymes in long-term pastures under continuous grazing (25 years). However, the enzyme activities expressed per unit of SOC did not show changes in C and N-acquiring enzymes, suggesting a higher mineralization potential in pastures. Enzymatic stoichiometry analysis indicated a microbial P limitation that could lead to a high catabolic activity with a potential increase in the use of SOC by microbial communities in the search for P, thus affecting soil C sequestration, soil quality and the provision of soil-related ecosystem services.



2021 ◽  
Vol 10 (10) ◽  
pp. e580101019144
Author(s):  
Rafaela Martins da Silva ◽  
Rakiely Martins da Silva ◽  
Sandra Santana de Lima ◽  
Jianne Rafaela Mazzini de Souza ◽  
Jheny Kesley Mazzini de Souza ◽  
...  

The objective of this study was to evaluate soil macrofauna as a bioindicator of soil quality in successional agroforestry systems and secondary forests. The study was conducted in the southern lower region of Bahia in Brazil, in two areas: a successional agroforestry system (AFS18) and native forest (NF).  AFS18 consists of two species: mahogany (Khaya ivorensis and Khaya grandifoliola), açaí (Euterpe oleracea), cacao (Theobroma cacau) and banana (Musa spp.).  Sampling was carried out in the dry (June) and rainy (October) seasons of 2019, and eight soil monoliths were collected in both areas.  A total of 889 individuals from the soil macrofauna were sampled. The highest frequency (RF) of taxons occurred in NF in the rainy season, and the groups that stood out were: Oligochaeta with 42% FR in ASF18, Formicide with 33.9% in NF and Isoptera with 58% in AFS18. The macrofauna structure of the soil varied according to the time of collection. The density of macrofauna individuals differed between areas only in the dry season. The highest number of ind.m² was observed in the area NF (378) when compared to ASF18 (196). TOC, Mg2+, Al3+ and CTC were related to AF on both occasions of collection and AFS18 in the rainy season, K+, P and pH were associated with AFS18 in the dry season. The diversity, equitability and richness of the soil macrofauna was greater in AF area. HFA18 in the rainy season was similar to NF, favoring colonization of the area by soil macrofauna organisms.



2018 ◽  
Vol 42 (2) ◽  
Author(s):  
Guilherme Musse Moreira ◽  
Júlio César Lima Neves ◽  
Genelício Crusoé Rocha ◽  
Ciro Augusto de Souza Magalhães ◽  
Austeclinio Lopes Farias Neto ◽  
...  

ABSTRACT Integrated crop-livestock-forest (iCLF) systems have gained prominence in the past decades as an alternative of sustainable land use, particularly in regions in which there is pressure against agricultural expansion in protected ecosystems such as the Brazilian Amazon. In this context, the objective of this study is to evaluate the effects of one year of use of the iCLF system in the Cerrado/Amazon transition region to determine its impact on soil quality compared to other traditional land uses in the region (planted forest, crop, forage, and native forest). The results indicated that the iCLF system did not jeopardize the soil physical quality, and only the crop land use affected the soil physical attributes. The land uses with the lowest impact on the physical condition of the soil were the iCLF system and the planted forest.



2020 ◽  
Vol 12 (8) ◽  
pp. 3490
Author(s):  
Bharat Bhushan Vashisht ◽  
Bijesh Maharjan ◽  
Sandeep Sharma ◽  
Samanpreet Kaur

The present study assessed the overall state of the soil based on the most sensitive soil attributes under different land uses—i.e., rainfed agriculture, mixed forest, afforestation and non-arable lands—in the lower Shivaliks of Indian Punjab. The soil parameters—i.e., erosion ratio, bulk density and water retention characteristics—and fertility parameters were integrated under different land uses to identify potential soil quality indicators.The overall state of the soil, based on a weighted average of primary soil functions under different land uses through fuzzy modeling, was deemed best for agricultural land use (0.515), followed by forests (0.465) and non-arable lands (0.456), and deemed worst under afforestation (0.428). Among the different land use systems, principal component analysis (PCA) clearly separated the agriculture and forest samples from afforestation and non-arable lands samples. The contribution of potential indicators such as erosion ratio (ER), phosphorus (P) and potassium (K) toward the soil quality index (SQI) was substantial. The order of contribution of the selected indicators to the SQI was 53.5%, 34.3% and 19.9% for ER, P and K, respectively. These indicators are most influential for studying real time soil health and ecological processes in the future, under various land use systems in degraded agroecosystems like the Shivaliks.



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