Pub Date : 2023-08-01DOI: 10.1080/13416979.2023.2239136
E. Njoghomi, S. Valkonen, W. A. Mugasha
ABSTRACT Miombo woodlands constitute the most extensive type of forest cover within South and East Africa, Tanzania in particular, and they are seriously threatened by intensive degradation and deforestation. The dynamics of miombo stands were examined in this study using a simple simulation system applied to experimental stands at the Kitulangalo Forest Reserve (KFR) in Tanzania. Prediction of tree-level diameter increment, mortality, and ingrowth across species groups with empirical models based on data from experimental sites constituted the essential elements of the simulation system. Diameter distribution, stand basal area, volume yield, and above-ground biomass accumulation were assessed in three harvesting alternatives across three species groups. The results indicate a high degree of positive response to careful selective harvesting in lightly degraded, recovering miombo forests. Simulation systems compiled from experimentally based models seem promising as tools for research on stand dynamics and sustainable management alternatives in miombo woodlands.
{"title":"Simulation of stand dynamics for miombo woodlands in Kitulangalo Forest Reserve, Morogoro, Tanzania","authors":"E. Njoghomi, S. Valkonen, W. A. Mugasha","doi":"10.1080/13416979.2023.2239136","DOIUrl":"https://doi.org/10.1080/13416979.2023.2239136","url":null,"abstract":"ABSTRACT Miombo woodlands constitute the most extensive type of forest cover within South and East Africa, Tanzania in particular, and they are seriously threatened by intensive degradation and deforestation. The dynamics of miombo stands were examined in this study using a simple simulation system applied to experimental stands at the Kitulangalo Forest Reserve (KFR) in Tanzania. Prediction of tree-level diameter increment, mortality, and ingrowth across species groups with empirical models based on data from experimental sites constituted the essential elements of the simulation system. Diameter distribution, stand basal area, volume yield, and above-ground biomass accumulation were assessed in three harvesting alternatives across three species groups. The results indicate a high degree of positive response to careful selective harvesting in lightly degraded, recovering miombo forests. Simulation systems compiled from experimentally based models seem promising as tools for research on stand dynamics and sustainable management alternatives in miombo woodlands.","PeriodicalId":15839,"journal":{"name":"Journal of Forest Research","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44975239","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ABSTRACT Increases in the number of wild herbivores resulted in understory degradation because of their overgrazing in forest ecosystems. Deer overgrazing has occurred soil erosion in Japanese beech forests where dwarf bamboo used to be densely covered. Soil erosion can result in a decrease in soil carbon and nutrient contents, causing the soil microbial respiration in such forest ecosystems to be degraded. The objective of this study was to clarify the effects of soil erosion, which sporadically occurs within the forests, on soil properties and microbial activity. Soil erosion indices, such as the maximum height of exposed roots from the soil surface (MAXH), tree and soil properties, microbial basal and substrate-induced respiration, were measured under the canopy of 16 beech trees in each of three deciduous broadleaved forests on southern Kyushu Island, Japan. Soil properties such as the humus mass and the organic matter contents of soil and humus decreased with MAXH. Basal and substrate-induced respiration decreased with increases in MAXH. Soil properties associated with organic matter increased with basal and substrate-induced respiration. These results suggest that soil surface layers that were rich in organic matter ran off because of soil erosion, resulting in the degradation of soil microbial activity. This study suggests that increases in wild herbivore populations degrade soil ecosystem functioning owing to the soil erosion induced by understory disappearance.
{"title":"Soil erosion decreases soil microbial respiration in Japanese beech forests with understory vegetation lost by deer","authors":"Ayumi Katayama, Mimori Oyamada, Hayato Abe, Kazushige Uemori, Takuo Hishi","doi":"10.1080/13416979.2023.2235499","DOIUrl":"https://doi.org/10.1080/13416979.2023.2235499","url":null,"abstract":"ABSTRACT Increases in the number of wild herbivores resulted in understory degradation because of their overgrazing in forest ecosystems. Deer overgrazing has occurred soil erosion in Japanese beech forests where dwarf bamboo used to be densely covered. Soil erosion can result in a decrease in soil carbon and nutrient contents, causing the soil microbial respiration in such forest ecosystems to be degraded. The objective of this study was to clarify the effects of soil erosion, which sporadically occurs within the forests, on soil properties and microbial activity. Soil erosion indices, such as the maximum height of exposed roots from the soil surface (MAXH), tree and soil properties, microbial basal and substrate-induced respiration, were measured under the canopy of 16 beech trees in each of three deciduous broadleaved forests on southern Kyushu Island, Japan. Soil properties such as the humus mass and the organic matter contents of soil and humus decreased with MAXH. Basal and substrate-induced respiration decreased with increases in MAXH. Soil properties associated with organic matter increased with basal and substrate-induced respiration. These results suggest that soil surface layers that were rich in organic matter ran off because of soil erosion, resulting in the degradation of soil microbial activity. This study suggests that increases in wild herbivore populations degrade soil ecosystem functioning owing to the soil erosion induced by understory disappearance.","PeriodicalId":15839,"journal":{"name":"Journal of Forest Research","volume":"1 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41375321","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-12DOI: 10.1080/13416979.2023.2232086
Á. Langer, E. Solano, L. Bacigalupe, B. Soto, Angie Asenjo, Ariel Cifuentes, Ibeth Navarrete, Rodrigo C. Vergara, C. Steinebach
ABSTRACT Urban life has generally resulted in lifestyles characterised by high stress and anxiety, all which has increased the pervasiveness of mental disorders. University students, a group highly vulnerable to these problems, are likely to develop mental pathologies associated with anxiety and substance abuse. Forest bathing is one nature-oriented intervention aimed at improving physical as well as psychological well-being by reducing anxious symptomatology and stress. Here we evaluated the healing impact of forest bathing on the stress and anxiety of undergraduate students at one local university. We also included others key aspects of psychological mental health that have received scarce attention in forest bathing research like mindfulness, wellbeing and self-regulated learning. Twenty-one students belonging to the Universidad Austral de Chile were randomly assigned to the city or forest groups and took part in an intervention consisting in a low-impact 30 minute walk and a 15-minute contemplation afterwards. Five instruments to evaluate overall mental health (and blood pressure) were applied before and after the intervention. Our results showed that a rather short session of forest bathing is enough to reduce anxiety in undergraduate university students. The other measures of psychological or physiological health showed no statistical differences before and after the intervention (between city and forest) or time effects (within the forest or city treatment). A potential reason for this might be related to the short duration of the intervention itself. Our results are encouraging regarding mental health therapy, as this type of intervention could easily be implemented on campus.
{"title":"Forest bathing diminishes anxiety in undergraduate students: a pilot study in the Valdivian temperate rainforest","authors":"Á. Langer, E. Solano, L. Bacigalupe, B. Soto, Angie Asenjo, Ariel Cifuentes, Ibeth Navarrete, Rodrigo C. Vergara, C. Steinebach","doi":"10.1080/13416979.2023.2232086","DOIUrl":"https://doi.org/10.1080/13416979.2023.2232086","url":null,"abstract":"ABSTRACT Urban life has generally resulted in lifestyles characterised by high stress and anxiety, all which has increased the pervasiveness of mental disorders. University students, a group highly vulnerable to these problems, are likely to develop mental pathologies associated with anxiety and substance abuse. Forest bathing is one nature-oriented intervention aimed at improving physical as well as psychological well-being by reducing anxious symptomatology and stress. Here we evaluated the healing impact of forest bathing on the stress and anxiety of undergraduate students at one local university. We also included others key aspects of psychological mental health that have received scarce attention in forest bathing research like mindfulness, wellbeing and self-regulated learning. Twenty-one students belonging to the Universidad Austral de Chile were randomly assigned to the city or forest groups and took part in an intervention consisting in a low-impact 30 minute walk and a 15-minute contemplation afterwards. Five instruments to evaluate overall mental health (and blood pressure) were applied before and after the intervention. Our results showed that a rather short session of forest bathing is enough to reduce anxiety in undergraduate university students. The other measures of psychological or physiological health showed no statistical differences before and after the intervention (between city and forest) or time effects (within the forest or city treatment). A potential reason for this might be related to the short duration of the intervention itself. Our results are encouraging regarding mental health therapy, as this type of intervention could easily be implemented on campus.","PeriodicalId":15839,"journal":{"name":"Journal of Forest Research","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41703437","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-03DOI: 10.1080/13416979.2023.2229984
Maho Yamamoto, Akio Inoue
ABSTRACT Bamboo forests are expected to play an important role in mitigating climate change. However, the capacity of bamboo forests to sequester and store carbon has not been assessed on a national scale in Japan. This study estimates the changes in the carbon stock of bamboo forests (CSbamboo) in Japan from 1985 to 2005. We compiled two data sets: (1) administrative statistical data on bamboo stand area (BSA) and (2) published data on stand-level aboveground biomass for Phyllostachys pubescens Mazel ex Houz. (n = 44) and Phyllostachys bambusoides Sieb. et Zucc. (n = 13). The BSA expanded from 147 kha in 1985 to 158 kha in 2005. The average carbon density (CD) of managed and abandoned stands were 84.9 Mg C ha−1 and 115.1 Mg C ha−1 for P. pubescens and 24.1 Mg C ha−1 and 46.4 Mg C ha−1 for P. bambusoides, respectively. The CD of P. pubescens stands in Japan was higher than that in other Asian countries and regions and was comparable to the CD of other forests in Japan. The area-based method indicated that the CSbamboo increased from 10.1 ± 2.6 Tg C to 13.9 ± 1.7 Tg C during the 20-year period, representing less than 1% of the total carbon pool of the forested area. The increase in CSbamboo was primarily caused by the synergistic effect of the abandonment and range expansion of P. pubescens forests. Our results suggest that P. pubescens forests are overstocked, and the increase in the CSbamboo is undesirable.
{"title":"Predicting changes in the carbon stocks of bamboo forests in Japan from 1985 to 2005","authors":"Maho Yamamoto, Akio Inoue","doi":"10.1080/13416979.2023.2229984","DOIUrl":"https://doi.org/10.1080/13416979.2023.2229984","url":null,"abstract":"ABSTRACT Bamboo forests are expected to play an important role in mitigating climate change. However, the capacity of bamboo forests to sequester and store carbon has not been assessed on a national scale in Japan. This study estimates the changes in the carbon stock of bamboo forests (CSbamboo) in Japan from 1985 to 2005. We compiled two data sets: (1) administrative statistical data on bamboo stand area (BSA) and (2) published data on stand-level aboveground biomass for Phyllostachys pubescens Mazel ex Houz. (n = 44) and Phyllostachys bambusoides Sieb. et Zucc. (n = 13). The BSA expanded from 147 kha in 1985 to 158 kha in 2005. The average carbon density (CD) of managed and abandoned stands were 84.9 Mg C ha−1 and 115.1 Mg C ha−1 for P. pubescens and 24.1 Mg C ha−1 and 46.4 Mg C ha−1 for P. bambusoides, respectively. The CD of P. pubescens stands in Japan was higher than that in other Asian countries and regions and was comparable to the CD of other forests in Japan. The area-based method indicated that the CSbamboo increased from 10.1 ± 2.6 Tg C to 13.9 ± 1.7 Tg C during the 20-year period, representing less than 1% of the total carbon pool of the forested area. The increase in CSbamboo was primarily caused by the synergistic effect of the abandonment and range expansion of P. pubescens forests. Our results suggest that P. pubescens forests are overstocked, and the increase in the CSbamboo is undesirable.","PeriodicalId":15839,"journal":{"name":"Journal of Forest Research","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47545689","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-26DOI: 10.1080/13416979.2023.2227820
Masayasu Nishioka, Haruka Inoue, T. Ota, N. Mizoue
ABSTRACT Assessing the impact of forest type and age on shallow landslide susceptibility is important for managing protective functions of forests. Previous studies have examined the correlation between forest types and ages, and shallow landslide susceptibility, but causal effects of forest type and age on shallow landslide susceptibility are yet not clear. This study investigated the causal effect of forest type and age on shallow landslide susceptibility using a propensity score method by combining existing geo-data sets. Here, we focus on shallow landslides caused by an extreme rainfall event on 5–6 July 2017, in the mountainous areas of Asakura City and Toho Village, Fukuoka Prefecture, Japan. Randomly located samples of coniferous forest, broadleaved forest, and young forest exposed to shallow landslide events were analyzed. The inverse probability of treatment weighting with the propensity score was applied to the samples to compare the differences in shallow landslide susceptibility among the three forest classes. Young forest had increased shallow landslide susceptibility, compared with coniferous forest and broadleaved forest, by 3.70 × 10−2 and 4.12 × 10−2, respectively, which corresponded to a two to three times increase in shallow landslide susceptibility when the forest changes from coniferous or broadleaved forest to young forest. No significant difference in shallow landslide susceptibility between coniferous forest and broadleaved forest was observed. These differences in shallow landslide susceptibility should be considered when implementing forest management schemes.
{"title":"Impact of forest type and age on shallow landslide susceptibility: a case study from the 2017 heavy rainfall in northern Kyushu, Japan","authors":"Masayasu Nishioka, Haruka Inoue, T. Ota, N. Mizoue","doi":"10.1080/13416979.2023.2227820","DOIUrl":"https://doi.org/10.1080/13416979.2023.2227820","url":null,"abstract":"ABSTRACT Assessing the impact of forest type and age on shallow landslide susceptibility is important for managing protective functions of forests. Previous studies have examined the correlation between forest types and ages, and shallow landslide susceptibility, but causal effects of forest type and age on shallow landslide susceptibility are yet not clear. This study investigated the causal effect of forest type and age on shallow landslide susceptibility using a propensity score method by combining existing geo-data sets. Here, we focus on shallow landslides caused by an extreme rainfall event on 5–6 July 2017, in the mountainous areas of Asakura City and Toho Village, Fukuoka Prefecture, Japan. Randomly located samples of coniferous forest, broadleaved forest, and young forest exposed to shallow landslide events were analyzed. The inverse probability of treatment weighting with the propensity score was applied to the samples to compare the differences in shallow landslide susceptibility among the three forest classes. Young forest had increased shallow landslide susceptibility, compared with coniferous forest and broadleaved forest, by 3.70 × 10−2 and 4.12 × 10−2, respectively, which corresponded to a two to three times increase in shallow landslide susceptibility when the forest changes from coniferous or broadleaved forest to young forest. No significant difference in shallow landslide susceptibility between coniferous forest and broadleaved forest was observed. These differences in shallow landslide susceptibility should be considered when implementing forest management schemes.","PeriodicalId":15839,"journal":{"name":"Journal of Forest Research","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43826598","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-25DOI: 10.1080/13416979.2023.2227822
Ziang Wang, Erda Wang, Yang Yu
ABSTRACT Conventional nonmarket valuation methods have several shortcomings and limitations. This study presents a novel method of the tourist satisfaction approach (TSA) and employs it to value the attributes of national forest parks (NFP) in China. A tourist satisfaction model was established to depict the underlying relationship of tourists’ satisfaction with park attributes, tourists’ demographic traits, and their travel costs. Data on tourist satisfaction and park attributes were collected from 30 Chinese NFPs. The results reveal that TSA can be a powerful tool for valuing NFP resources and their related management activities. The empirical results show that the quality of NFP attributes directly affects tourist satisfaction, which can lead to a significant amount of economic value. For example, on average, a visitor is willing to pay ¥323.18 ($47.86) to reduce park congestion, and ¥118.22 ($17.51) lessen the number of observable litter on the park sites.
{"title":"Translating Tourists’ Satisfaction Data into Economic Value of the National Forest Parks in China","authors":"Ziang Wang, Erda Wang, Yang Yu","doi":"10.1080/13416979.2023.2227822","DOIUrl":"https://doi.org/10.1080/13416979.2023.2227822","url":null,"abstract":"ABSTRACT Conventional nonmarket valuation methods have several shortcomings and limitations. This study presents a novel method of the tourist satisfaction approach (TSA) and employs it to value the attributes of national forest parks (NFP) in China. A tourist satisfaction model was established to depict the underlying relationship of tourists’ satisfaction with park attributes, tourists’ demographic traits, and their travel costs. Data on tourist satisfaction and park attributes were collected from 30 Chinese NFPs. The results reveal that TSA can be a powerful tool for valuing NFP resources and their related management activities. The empirical results show that the quality of NFP attributes directly affects tourist satisfaction, which can lead to a significant amount of economic value. For example, on average, a visitor is willing to pay ¥323.18 ($47.86) to reduce park congestion, and ¥118.22 ($17.51) lessen the number of observable litter on the park sites.","PeriodicalId":15839,"journal":{"name":"Journal of Forest Research","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46176130","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-19DOI: 10.1080/13416979.2023.2226053
J. Busato, Bruno Rogério de Souza, Alessandra Monteiro de Paula, F. F. Sodré, Aline Lima de Oliveira, L. B. Dobbss
ABSTRACT The guanandi is a tropical tree from the American continent suitable to compose agroforestry systems and forest-farming-livestock integration whose growth and development stages can be enhanced with the use of biostimulants. In this work, humic acids (HA) and aqueous extracts produced from vermicomposting cattle manure (AEVC), biostimulants commonly employed in short-cycle crops, were characterized and evaluated for initial growth and gas exchange in guanandi seedlings. The HA showed higher levels of C and N and lower H and O compared to AEVC, in addition to three times higher total acidity, higher aromaticity index, and clearer signals regarding symmetric stretching in carboxyl groups and C-O stretching of polysaccharides. Greater stimulation of guanandi growth, via the concentration-response test, was observed for concentrations of 22.24 mg L−1 for HA and 25.55 mg L−1 for AEVC. Increases in net CO2 assimilation, stomatal conductance and transpiration were detected only in seedlings receiving HA. Main root diameter, leaf area and aboveground wet mass increased for both treatments with HA (19.9, 11.0, and 22.8%) and AEVC (16.9, 11.2, and 18.6%). The set of responses associated with the use of HA and AEVC allow categorizing these materials as biostimulants capable of enhancing the initial growth of guanandi seedlings.
{"title":"Initial growth and physiology of guanandi (Calophyllum brasiliense Cambess) seedlings treated with humic acids and aqueous vermicompost extract","authors":"J. Busato, Bruno Rogério de Souza, Alessandra Monteiro de Paula, F. F. Sodré, Aline Lima de Oliveira, L. B. Dobbss","doi":"10.1080/13416979.2023.2226053","DOIUrl":"https://doi.org/10.1080/13416979.2023.2226053","url":null,"abstract":"ABSTRACT The guanandi is a tropical tree from the American continent suitable to compose agroforestry systems and forest-farming-livestock integration whose growth and development stages can be enhanced with the use of biostimulants. In this work, humic acids (HA) and aqueous extracts produced from vermicomposting cattle manure (AEVC), biostimulants commonly employed in short-cycle crops, were characterized and evaluated for initial growth and gas exchange in guanandi seedlings. The HA showed higher levels of C and N and lower H and O compared to AEVC, in addition to three times higher total acidity, higher aromaticity index, and clearer signals regarding symmetric stretching in carboxyl groups and C-O stretching of polysaccharides. Greater stimulation of guanandi growth, via the concentration-response test, was observed for concentrations of 22.24 mg L−1 for HA and 25.55 mg L−1 for AEVC. Increases in net CO2 assimilation, stomatal conductance and transpiration were detected only in seedlings receiving HA. Main root diameter, leaf area and aboveground wet mass increased for both treatments with HA (19.9, 11.0, and 22.8%) and AEVC (16.9, 11.2, and 18.6%). The set of responses associated with the use of HA and AEVC allow categorizing these materials as biostimulants capable of enhancing the initial growth of guanandi seedlings.","PeriodicalId":15839,"journal":{"name":"Journal of Forest Research","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44626694","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-16DOI: 10.1080/13416979.2023.2225240
Chao Wang, Kaiming Li, Ying Wang
ABSTRACT In ecologically fragile areas, accurate estimation of soil organic carbon (SOC) and soil nitrogen (STN) concentrations is a prerequisite for sustainable development. On the basis of field sampling data and remote sensing technology, this study divided the topsoil (0–30 cm) into three soil layers of 0–10 cm, 10–20 cm, and 20–30 cm to carry out SOC and STN concentrations estimation experiments in the Qilian Mountains in western China. To estimate SOC and STN concentrations, a stepwise multiple linear regression model was used. A total of 119 topsoil samples and nine remotely sensed environmental variables were collected and used for model development and validation. The results show that the stepwise multiple linear regression model has stable simulation performance. The modified soil-adjusted vegetation index (MSAVI), perpendicular vegetation index (PVI), aspect, elevation, and solar radiation were the key environmental variables affecting soil organic carbon and total nitrogen content. The ranking of SOC concentrations in the 0–30 cm soil layer was bush woods > spruce forests > sabina forests > alpine meadows > steppes, with mean concentrations of 117.98 g/kg, 101.35 g/kg, 83.09 g/kg, 78.76 g/kg, and 37.08 g/kg, respectively. The ranking of STN concentrations in the 0–30 cm soil layer was bush woods > alpine meadows >spruce forests > sabina forests > steppes, with mean concentrations of 4.77 g/kg, 3.71 g/kg, 3.19 g/kg, 3.27 g/kg, and 1.92 g/kg, respectively. Both SOC and STN concentrations decreased significantly with increasing soil depth.
{"title":"Estimating the spatial distribution of soil organic carbon and soil total nitrogen concentrations by remote sensing methods: a case study in a forest-dominated Alpine Watershed, Western China","authors":"Chao Wang, Kaiming Li, Ying Wang","doi":"10.1080/13416979.2023.2225240","DOIUrl":"https://doi.org/10.1080/13416979.2023.2225240","url":null,"abstract":"ABSTRACT In ecologically fragile areas, accurate estimation of soil organic carbon (SOC) and soil nitrogen (STN) concentrations is a prerequisite for sustainable development. On the basis of field sampling data and remote sensing technology, this study divided the topsoil (0–30 cm) into three soil layers of 0–10 cm, 10–20 cm, and 20–30 cm to carry out SOC and STN concentrations estimation experiments in the Qilian Mountains in western China. To estimate SOC and STN concentrations, a stepwise multiple linear regression model was used. A total of 119 topsoil samples and nine remotely sensed environmental variables were collected and used for model development and validation. The results show that the stepwise multiple linear regression model has stable simulation performance. The modified soil-adjusted vegetation index (MSAVI), perpendicular vegetation index (PVI), aspect, elevation, and solar radiation were the key environmental variables affecting soil organic carbon and total nitrogen content. The ranking of SOC concentrations in the 0–30 cm soil layer was bush woods > spruce forests > sabina forests > alpine meadows > steppes, with mean concentrations of 117.98 g/kg, 101.35 g/kg, 83.09 g/kg, 78.76 g/kg, and 37.08 g/kg, respectively. The ranking of STN concentrations in the 0–30 cm soil layer was bush woods > alpine meadows >spruce forests > sabina forests > steppes, with mean concentrations of 4.77 g/kg, 3.71 g/kg, 3.19 g/kg, 3.27 g/kg, and 1.92 g/kg, respectively. Both SOC and STN concentrations decreased significantly with increasing soil depth.","PeriodicalId":15839,"journal":{"name":"Journal of Forest Research","volume":"28 1","pages":"324 - 332"},"PeriodicalIF":1.5,"publicationDate":"2023-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41747401","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-14DOI: 10.1080/13416979.2023.2223440
Güliz Doğan, Ryunosuke Saito, S. Ueno, Yoichi Hasegawa, A. Matsumoto, Y. Moriguchi
{"title":"Development and characterization of EST-SSR markers from Thujopsis dolabrata var. hondae RNA-sequencing data","authors":"Güliz Doğan, Ryunosuke Saito, S. Ueno, Yoichi Hasegawa, A. Matsumoto, Y. Moriguchi","doi":"10.1080/13416979.2023.2223440","DOIUrl":"https://doi.org/10.1080/13416979.2023.2223440","url":null,"abstract":"","PeriodicalId":15839,"journal":{"name":"Journal of Forest Research","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44794785","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-07DOI: 10.1080/13416979.2023.2220189
Salanieta Tuisuva, S. Shibata
ABSTRACT Besides being socially and ecologically beneficial for Fiji’s human needs, mangrove management often clashes with development interests, such as tourism threatening their sustainability. To address these issues, the study analyzes mangrove management in practice, especially governance and institutional arrangements at the local level, to better understand how these arrangements function and influence mangrove resources. The study highlights the experiences of four villages within the Momi and Nadi districts, which gives us rich insight into the local-level dynamics of mangrove management within different types of arrangements over mangrove forests. A total of four types of surveys and analysis were conducted in this study including content analysis, talanoa sessions,, questionnaire surveys and an ecological survey. The study found that the existing legallframework indicated several challenges that have contributed to the poor management of mangroves over the years. This includes fragmented policy, lack of clarity on jurisdiction over mangrove resources among multiple ministries and these aspects are challenges highlighted in the study. The mangrove structure in the Nadi mangrove area changed drastically over the years, whilst in Momi, the changes are not visible, both indicated by the respondent .(Ecological survey shows that the Momi district`s mangorve forest has the highest tree densities when compared to Nadi district. The findings of this study are expected to substantially impact sustainable management strategies in addressing the environmental, social and economic impact of development on mangrove loss. The study recommends a mechanism such as PES to sustainably manage mangrove ecosystems and support policy implementation.
{"title":"Exploring sustainable mangrove management policy, challenges and structure: a case study of Nadi and Momi districts, Fiji Island","authors":"Salanieta Tuisuva, S. Shibata","doi":"10.1080/13416979.2023.2220189","DOIUrl":"https://doi.org/10.1080/13416979.2023.2220189","url":null,"abstract":"ABSTRACT Besides being socially and ecologically beneficial for Fiji’s human needs, mangrove management often clashes with development interests, such as tourism threatening their sustainability. To address these issues, the study analyzes mangrove management in practice, especially governance and institutional arrangements at the local level, to better understand how these arrangements function and influence mangrove resources. The study highlights the experiences of four villages within the Momi and Nadi districts, which gives us rich insight into the local-level dynamics of mangrove management within different types of arrangements over mangrove forests. A total of four types of surveys and analysis were conducted in this study including content analysis, talanoa sessions,, questionnaire surveys and an ecological survey. The study found that the existing legallframework indicated several challenges that have contributed to the poor management of mangroves over the years. This includes fragmented policy, lack of clarity on jurisdiction over mangrove resources among multiple ministries and these aspects are challenges highlighted in the study. The mangrove structure in the Nadi mangrove area changed drastically over the years, whilst in Momi, the changes are not visible, both indicated by the respondent .(Ecological survey shows that the Momi district`s mangorve forest has the highest tree densities when compared to Nadi district. The findings of this study are expected to substantially impact sustainable management strategies in addressing the environmental, social and economic impact of development on mangrove loss. The study recommends a mechanism such as PES to sustainably manage mangrove ecosystems and support policy implementation.","PeriodicalId":15839,"journal":{"name":"Journal of Forest Research","volume":"28 1","pages":"313 - 323"},"PeriodicalIF":1.5,"publicationDate":"2023-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48036346","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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