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ArticleMucuri Springs project: a long-term vision for the preservation of water resources
XV World Forestry Congress, 2-6 May 2022
2022Also available in:
No results found.The Mucuri Springs Project aims to promote the rational use of natural resources in rural properties located in the Mucuri River Basin, in the northeast of Minas Gerais and the extreme south of Bahia States, Brazil, encouraging the conservation and recovery of springs, watercourses, and permanent preservation areas. The prject also seeks to promote the transition to agroecology, guiding farmers, farmer’s families, and rural communities for more sustainable production, combining food security, income generation, and delivering environmental education throughout public reading policies and training in rural communities. It started in three municipalities of Minas Gerais State, and in 2019 a study was carried out to map the most critical areas in terms of a greater potential for soil loss and for water production. Within over three years of experience, the project has served 49 rural communities and has involved 1,506 families, 351 of which are partners. Altogether, 1,468 springs were mapped and characterized, of which 402 were protected, totaling more than 200 hectares in process of restoration and over 30 thousand native seedlings planted. These areas are being monitored and, when needed, restoration techniques have been proposed. Regarding agroecological practices, until now, agroforestry systems have been implemented in two properties and more than 2,600 seedlings have been supplied and planted to enrich the productive yard and preservation areas. Rotational management was also implemented in eleven pasture areas, 3,30 hectares of family crops were fertilized organically, and 21,50 hectares were given techniques for soil recovery. The Project has the perspective of operating strategically on priority areas of the Mucuri River basin, seeking regular flow and reducing impacts of climate change for the region . Keywords: Partnerships, Deforestation and forest degradation, Economic Development, Education, Sustainable forest management. ID: 3487504 -
DocumentManaging taxonomic and functional diversity is the key to sustain aboveground biomass and soil microbial diversity: A synthesis from long-term forest restoration of southern China
XV World Forestry Congress, 2-6 May 2022
2022Also available in:
No results found.Exploring the biodiversity-ecosystem functioning relationship is one of the central goals of ecological research. Restoration is essential for supporting key ecosystem functions such as aboveground biomass production and managing soil microbial diversity. However, the relative importance of functional versus taxonomic diversity in explaining aboveground biomass and soil microbial diversity during restoration is poorly understood. Here, we used a trait-based approach to test for the importance of multiple plant diversity attributes in regulating aboveground biomass and soil microbial diversity in four 30- years-old restored subtropical forests in southern China. High-throughput Illumina sequencing was applied for detecting fungal and bacterial diversity. We show that both taxonomic and functional diversities are significant and positive regulators of aboveground biomass; however, functional diversity (FD) was more important than taxonomic diversity (TD) in controlling aboveground biomass. FD had the strongest direct effect on aboveground biomass compared with TD, soil properties, and community weighted mean (CWM) traits. Our results further indicate that leaf and root morphological traits and traits related to the nutrient content in plant tissues showed acquisitive resource use strategy which influenced aboveground biomass. In contrast to aboveground biomass, taxonomic diversity explained more of the soil microbial diversity than the FD and soil properties. Prediction of fungal richness was better than that of bacterial richness. In addition, root traits explained more variation of soil microbes than the leaf traits. Our results suggest that both TD and FD play a role in shaping aboveground biomass and soil microbial diversity; but FD is more important in supporting aboveground biomass while TD for belowground microbial diversity. These results imply that enhancing TD and FD is important to restoring and managing degraded forest landscapes. Key words: Biodiversity-Ecosystem functions; soil microbial diversity, taxonomic diversity, functional diversity, forest restoration ID: 3486373 -
ArticleNew findings on loblolly pine plantations from long-term experimental field studies
XV World Forestry Congress, 2-6 May 2022
2022Also available in:
No results found.Pine plantations in the southern US have been among the most intensively managed forests in the world. Their productivity has been enhanced by intensive silvicultural treatments over the past 60 years, and our knowledge about their treatment response has been expanded through long-term large-scale experimental studies. The analysis of nine long-term loblolly pine (Pinus taeda L.) field trials resulted in several new findings. For loblolly pine in the southern US, there exist maximum productivity and maximum response to silvicultural practices. The maximum response was inversely proportional to the base site quality. The maximum stand basal area (BA) and maximum stand density index (SDI) were redefined for individual stands. The average maximum stand BA and maximum SDI were 46.2 m2 ha-1 and 1002 tph, respectively, and both showed significant variation (30.2– 61.7 m2 ha-1 and 600–1410 tph, respectively). Stand aboveground net primary production (ANPP) generally increased with increasing site quality, due to increased stand foliage biomass in the early stage, and mainly due to increased growth efficiency in the late stages of stand development. More intensive silvicultural treatments increased foliage biomass, thus increased ANPP at early ages; thereafter silvicultural intensity did not affect foliage biomass, ANPP, and growth efficiency. The trend of early age increases in both foliage biomass and ANPP resulting from increased planting density did not hold true with stand development. Keywords: pine plantation; maximum stand density index; maximum stand basal area; maximum response; intensive management ID: 3606017
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