Hemisphere photos are now widely applied to provide information about solar radiation dynamics, canopy structure and their contribution to biophysical processes, plant productivity and ecosystem properties. The present study aims to improve the original “edge detection” method for binary classification between sky and canopy, which works not well for closed canopies. We supposed such inaccuracy probably is due to the influence of sky pixels on their neighbor canopy pixels. Here we introduced a new term “neighbor distance”, defined as the distance between pixels participated in the calculation of contrast at the edges between classified canopy and sky, into the “edge detection” method. We showed that choosing a suitable neighbor distance for a photo with specific gap fraction can significantly improve the accuracy of the original “edge detection” method. Combining the modified “edge detection” method and an iterative selection method, with the aid of an empirical power function for the relationship between neighbor distance and manually verified gap fraction, we developed a ND-IS (Neighbor Distance-Iteration Selection) method that can automatically determine the threshold values of hemisphere photos with high accuracy and reproductivity. This procedure worked well throughout a broad range of gap fraction (0.019 to 0.945) with different canopy composition and structure, in five forest biomes along a broad gradient of latitude and longitude across Eastern China. Our results highlight the necessity of integrating neighbor distance into the original “edge detection” algorithm. The advantages and limitations of the method, and the application of the method in the field were also discussed.
{"title":"An improved method for edge detection based on neighbor distance for processing hemispheric photography in studying canopy structure and radiative transfer","authors":"Yasi Liu, Dayong Fan, Han Sun, Xiangping Wang","doi":"10.1093/jpe/rtae022","DOIUrl":"https://doi.org/10.1093/jpe/rtae022","url":null,"abstract":"\u0000 Hemisphere photos are now widely applied to provide information about solar radiation dynamics, canopy structure and their contribution to biophysical processes, plant productivity and ecosystem properties. The present study aims to improve the original “edge detection” method for binary classification between sky and canopy, which works not well for closed canopies. We supposed such inaccuracy probably is due to the influence of sky pixels on their neighbor canopy pixels. Here we introduced a new term “neighbor distance”, defined as the distance between pixels participated in the calculation of contrast at the edges between classified canopy and sky, into the “edge detection” method. We showed that choosing a suitable neighbor distance for a photo with specific gap fraction can significantly improve the accuracy of the original “edge detection” method. Combining the modified “edge detection” method and an iterative selection method, with the aid of an empirical power function for the relationship between neighbor distance and manually verified gap fraction, we developed a ND-IS (Neighbor Distance-Iteration Selection) method that can automatically determine the threshold values of hemisphere photos with high accuracy and reproductivity. This procedure worked well throughout a broad range of gap fraction (0.019 to 0.945) with different canopy composition and structure, in five forest biomes along a broad gradient of latitude and longitude across Eastern China. Our results highlight the necessity of integrating neighbor distance into the original “edge detection” algorithm. The advantages and limitations of the method, and the application of the method in the field were also discussed.","PeriodicalId":50085,"journal":{"name":"Journal of Plant Ecology","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140362580","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Publication-level analysis of Journal of Plant Ecology during 2018–2022","authors":"Yu Liao, Pu Wang, Lijuan Liu, Wen-Hao Zhang","doi":"10.1093/jpe/rtad046","DOIUrl":"https://doi.org/10.1093/jpe/rtad046","url":null,"abstract":"","PeriodicalId":50085,"journal":{"name":"Journal of Plant Ecology","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140369736","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Direct sewage discharge may enhance soil nitrous oxide (N2O) emissions, worsening the greenhouse effect. However, the effects of sewage discharge into bogs on N2O flux, drivers, and influencing mechanisms remain unclear. Additionally, investigating the impact of reclaimed water on N2O flux is important for bog replenishment and water shortage alleviation. This study simulated sewage from different sources into a bog and analyzed N2O fluxes, soil (organic carbon, total nitrogen, ammonium nitrogen, nitrate nitrogen, total phosphorus, available phosphorus, pH, and electrical conductivity), plant (species richness and biomass), and microorganisms (ammonia-oxidizing archaea, napA, nirS, nirK, and nosZ genes). Results showed that the reclaimed water did not significantly change N2O flux, while 50% tap water mixed with 50% domestic sewage and domestic sewage significantly increased the N2O flux. Among soil factors, available nitrogen and pH were key in influencing N2O flux. Among plant parameters, species richness was the primary factor affecting N2O flux. Nitrogen transformation functional genes contributed the most to the increase in the N2O fluxes, with an increase in domestic sewage input leading to a higher abundance of these genes and subsequent N2O emissions. Therefore, domestic sewage should be considered, as it significantly increases N2O emissions by affecting the soil, plants, and microorganisms, thereby increasing the global warming potential. This study's findings suggest that using treated reclaimed water for bog replenishment could be an environmentally friendly approach to wetland management.
{"title":"Effects and driving factors of domestic sewage from different sources on nitrous oxide emissions in a bog","authors":"Yue Li, Zhongbing Chen, Xue Wang, Haibo Jiang, Chunguang He, Yao Shi, Lianxi Sheng","doi":"10.1093/jpe/rtae020","DOIUrl":"https://doi.org/10.1093/jpe/rtae020","url":null,"abstract":"\u0000 Direct sewage discharge may enhance soil nitrous oxide (N2O) emissions, worsening the greenhouse effect. However, the effects of sewage discharge into bogs on N2O flux, drivers, and influencing mechanisms remain unclear. Additionally, investigating the impact of reclaimed water on N2O flux is important for bog replenishment and water shortage alleviation. This study simulated sewage from different sources into a bog and analyzed N2O fluxes, soil (organic carbon, total nitrogen, ammonium nitrogen, nitrate nitrogen, total phosphorus, available phosphorus, pH, and electrical conductivity), plant (species richness and biomass), and microorganisms (ammonia-oxidizing archaea, napA, nirS, nirK, and nosZ genes). Results showed that the reclaimed water did not significantly change N2O flux, while 50% tap water mixed with 50% domestic sewage and domestic sewage significantly increased the N2O flux. Among soil factors, available nitrogen and pH were key in influencing N2O flux. Among plant parameters, species richness was the primary factor affecting N2O flux. Nitrogen transformation functional genes contributed the most to the increase in the N2O fluxes, with an increase in domestic sewage input leading to a higher abundance of these genes and subsequent N2O emissions. Therefore, domestic sewage should be considered, as it significantly increases N2O emissions by affecting the soil, plants, and microorganisms, thereby increasing the global warming potential. This study's findings suggest that using treated reclaimed water for bog replenishment could be an environmentally friendly approach to wetland management.","PeriodicalId":50085,"journal":{"name":"Journal of Plant Ecology","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140379127","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Rubber plantations have increased significantly under unprecedented economic growth in tropical areas, which leads to soil degradation and thereby alters soil hydrological processes. However, our understanding of how forest conversion affects soil hydrological processes remains unclear. Here, we collected soil samples from secondary forests (SF) and rubber plantations (RP) to determine the soil hydrological characteristics. We found the topsoil (0–20 cm) water retention in SF was higher than that of RP but displayed the contrast pattern in a deeper soil layer (20–60 cm). Meanwhile, the soil infiltration rates among two vegetation types decreased significantly with infiltration time, with higher stable soil infiltration rates in SF than those in RP. Moreover, soil properties were also impacted by the forest conversion, such as the topsoil capillary porosity and total porosity in SF were higher than those of RP but contrasted in a deep soil layer. In comparison, the topsoil bulk density in SF was lower than that of RP, but contrasted in the deep soil layer and reached a significant level in the 0–10 cm and 40–50 cm (P<0.05). Overall, the soil water retention was mainly determined by the capillary porosity, which could explain 31.56% of total variance in soil water retention, followed by total porosity (26.57%) and soil bulk density (26.47%), whereas soil texture exerts a week effect on soil water retention. Therefore, we can conclude that the conversion of tropical rainforest into rubber plantations may accelerate soil erosion owing to its lower soil water retention and soil infiltration rates.
在热带地区前所未有的经济增长下，橡胶种植园大幅增加，导致土壤退化，从而改变了土壤水文过程。然而，我们对森林转换如何影响土壤水文过程的认识仍不清楚。在此，我们采集了次生林（SF）和橡胶种植园（RP）的土壤样本，以确定土壤的水文特征。我们发现，次生林表层土壤（0-20 厘米）的保水率高于橡胶园，但在更深的土层（20-60 厘米）中，两者的保水率却形成了鲜明的对比。同时，两种植被类型的土壤入渗率随入渗时间的延长而显著降低，其中 SF 的土壤稳定入渗率高于 RP。此外，土壤特性也受到森林改造的影响，如 SF 的表土毛管孔隙度和总孔隙度均高于 RP，但在深土层中则形成鲜明对比。相比之下，SF 的表土容重低于 RP，但在深土层中形成对比，在 0-10 厘米和 40-50 厘米处达到显著水平（P<0.05）。总体而言，土壤保水性主要由毛管孔率决定，毛管孔率可解释土壤保水性总方差的 31.56%，其次是总孔隙度（26.57%）和土壤容重（26.47%），而土壤质地对土壤保水性的影响较小。因此，我们可以得出结论，将热带雨林转化为橡胶种植园可能会加速土壤侵蚀，因为其土壤保水率和土壤渗透率较低。
{"title":"Soil hydrological processes as affected by the conversion of natural tropical rainforest to monoculture rubber plantations","authors":"Qiaoyan Chen, Ruiyu Fu, Siyuan Cheng, Dong Qiao, Zhongmin Hu, Zijia Zhang, Licong Dai","doi":"10.1093/jpe/rtae021","DOIUrl":"https://doi.org/10.1093/jpe/rtae021","url":null,"abstract":"\u0000 Rubber plantations have increased significantly under unprecedented economic growth in tropical areas, which leads to soil degradation and thereby alters soil hydrological processes. However, our understanding of how forest conversion affects soil hydrological processes remains unclear. Here, we collected soil samples from secondary forests (SF) and rubber plantations (RP) to determine the soil hydrological characteristics. We found the topsoil (0–20 cm) water retention in SF was higher than that of RP but displayed the contrast pattern in a deeper soil layer (20–60 cm). Meanwhile, the soil infiltration rates among two vegetation types decreased significantly with infiltration time, with higher stable soil infiltration rates in SF than those in RP. Moreover, soil properties were also impacted by the forest conversion, such as the topsoil capillary porosity and total porosity in SF were higher than those of RP but contrasted in a deep soil layer. In comparison, the topsoil bulk density in SF was lower than that of RP, but contrasted in the deep soil layer and reached a significant level in the 0–10 cm and 40–50 cm (P<0.05). Overall, the soil water retention was mainly determined by the capillary porosity, which could explain 31.56% of total variance in soil water retention, followed by total porosity (26.57%) and soil bulk density (26.47%), whereas soil texture exerts a week effect on soil water retention. Therefore, we can conclude that the conversion of tropical rainforest into rubber plantations may accelerate soil erosion owing to its lower soil water retention and soil infiltration rates.","PeriodicalId":50085,"journal":{"name":"Journal of Plant Ecology","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140380895","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Arbuscular mycorrhizal fungi (AMF) enhance plant tolerance to abiotic stresses like salinity and improve crop yield. However, their effects are variable, and the underlying cause of such variation remains largely unknown. This study aimed to assess how drought modified the AMF effect on plant resistance to high calcium-saline stress. A pot experiment was performed to examine how AMF inoculation affects the growth, photosynthetic activity, nutrient uptake, and C:N:P stoichiometric ratio of maize under high calcium stress and contrasting water conditions. The results showed that high calcium stress significantly reduced mycorrhizal colonization, biomass accumulation, C assimilation rate, and C:N stoichiometric ratio in plant tissues. Besides, the adverse effects of calcium stress on photosynthesis were exacerbated under drought. AMF inoculation profoundly alleviated such reductions under drought and saline stress. However, it barely impacted maize performance when subjected to calcium stress with well-watered conditions. Moreover, watering changed AMF impact on nutrient allocation in plant tissues. Under well-watered conditions, AMF stimulated P accumulation in roots and plant growth, but did not induce leaf P accumulation proportional to C and N, resulting in increased leaf C:P and N:P ratios under high calcium stress. In contrast, AMF decreased N content and the N:P ratio in leaves under drought. Overall, AMF inoculation improved maize resistance to calcium salt through enhanced photosynthesis and modulation of nutrient stoichiometry, particularly under water deficit. This study highlighted the regulatory role of AMF in carbon assimilation and nutrient homeostasis under compound stresses, which provides significant guidance on crop yield improvement in saline and arid regions.
{"title":"Effects of arbuscular mycorrhizal fungi on carbon assimilation and ecological stoichiometry of maize (Zea mays) under combined abiotic stresses","authors":"Q. Ran, Songlin Zhang, Muhammad Arif, Xueting Yin, Shanshan Chen, Guangqian Ren","doi":"10.1093/jpe/rtae010","DOIUrl":"https://doi.org/10.1093/jpe/rtae010","url":null,"abstract":"\u0000 Arbuscular mycorrhizal fungi (AMF) enhance plant tolerance to abiotic stresses like salinity and improve crop yield. However, their effects are variable, and the underlying cause of such variation remains largely unknown. This study aimed to assess how drought modified the AMF effect on plant resistance to high calcium-saline stress. A pot experiment was performed to examine how AMF inoculation affects the growth, photosynthetic activity, nutrient uptake, and C:N:P stoichiometric ratio of maize under high calcium stress and contrasting water conditions. The results showed that high calcium stress significantly reduced mycorrhizal colonization, biomass accumulation, C assimilation rate, and C:N stoichiometric ratio in plant tissues. Besides, the adverse effects of calcium stress on photosynthesis were exacerbated under drought. AMF inoculation profoundly alleviated such reductions under drought and saline stress. However, it barely impacted maize performance when subjected to calcium stress with well-watered conditions. Moreover, watering changed AMF impact on nutrient allocation in plant tissues. Under well-watered conditions, AMF stimulated P accumulation in roots and plant growth, but did not induce leaf P accumulation proportional to C and N, resulting in increased leaf C:P and N:P ratios under high calcium stress. In contrast, AMF decreased N content and the N:P ratio in leaves under drought. Overall, AMF inoculation improved maize resistance to calcium salt through enhanced photosynthesis and modulation of nutrient stoichiometry, particularly under water deficit. This study highlighted the regulatory role of AMF in carbon assimilation and nutrient homeostasis under compound stresses, which provides significant guidance on crop yield improvement in saline and arid regions.","PeriodicalId":50085,"journal":{"name":"Journal of Plant Ecology","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140437884","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Although characterization of plant interactions has become a research hotspot to assess the adaptability of endangered plants, the underlying molecular basis remains elusive. Dove tree (Davidia involucrata Baill.) seedlings were watered with distilled water (CK), leaf water extract (0.025 g mL-1) and branch water extract (0.1 g mL-1) from Cornus controversa, respectively. Subsequently, the morphology, biomass and gene expression levels of DiSOC1-b and DiCCoAOMT1 were analyzed. The results showed that morphological traits and biomass accumulation of D. involucrata seedlings were decreased by the addition of leaf water extracts, and increased by branch water extracts. Moreover, the gene expression level of DiSOC1-b was significantly down-regulated, while the gene expression level of DiCCoAOMT1 was significantly up-regulated in the stems and roots of D. involucrata upon treatment with leaf water extracts of C. controversa. In contrast, the gene expression level of DiSOC1-b was significantly up-regulated in the leaves and stems, while the gene expression level of DiCCoAOMT1 was significantly down-regulated in the roots of D. involucrata upon treatment with branch water extracts of C. controversa. In addition, the expression level of DiSOC1-b was positively correlated with most of morphological traits and total biomass (P < 0.05), while DiCCoAOMT1 was negatively correlated with the majority of morphological traits in D. involucrata seedlings (P < 0.05). Taken together, these results suggest that water extracts from the leaves and branches of the C. controversa exhibit opposite allelopathic effects and affect the expression levels of genes related to growth (DiSOC1-b) and environmental adaptability (DiCCoAOMT1) in D. involucrata seedlings.
尽管植物相互作用的表征已成为评估濒危植物适应性的研究热点，但其潜在的分子基础仍然难以捉摸。分别用蒸馏水（CK）、山茱萸叶水提取物（0.025 g mL-1）和山茱萸枝水提取物（0.1 g mL-1）浇灌珙桐（Davidia involucrata Baill.）幼苗。随后，对 DiSOC1-b 和 DiCCoAOMT1 的形态、生物量和基因表达水平进行了分析。结果表明，加入叶片水提取物后，D. involucrata幼苗的形态特征和生物量积累减少，而加入枝条水提取物后，幼苗的形态特征和生物量积累增加。此外，用 C. controversa 的叶水提取物处理 D. involucrata 的茎和根时，DiSOC1-b 的基因表达水平显著下调，而 DiCCoAOMT1 的基因表达水平显著上调。相反，用 C. controversa 的枝叶水提取物处理 D. involucrata 后，DiSOC1-b 在叶和茎中的基因表达水平明显上调，而 DiCCoAOMT1 在根中的基因表达水平明显下调。此外，DiSOC1-b 的表达水平与 D. involucrata 幼苗的大多数形态特征和总生物量呈正相关（P < 0.05），而 DiCCoAOMT1 与 D. involucrata 幼苗的大多数形态特征呈负相关（P < 0.05）。综上所述，这些结果表明，从C. controversa的叶片和枝条中提取的水提取物具有相反的等位基因效应，会影响D. involucrata幼苗中与生长（DiSOC1-b）和环境适应性（DiCCoAOMT1）相关基因的表达水平。
{"title":"Effects of water extract from Cornus controversa Hemsl. on the expression levels of DiSOC1-b and DiCCoAOMT1 genes related with the growth of dove tree seedlings","authors":"Xiao-Yan Chen, Zheng-Chuan Liang, Yun Long, Ji-Hong Pan, Ting-Fa Dong, Qin-Song Liu, Xiao Xu","doi":"10.1093/jpe/rtae009","DOIUrl":"https://doi.org/10.1093/jpe/rtae009","url":null,"abstract":"\u0000 Although characterization of plant interactions has become a research hotspot to assess the adaptability of endangered plants, the underlying molecular basis remains elusive. Dove tree (Davidia involucrata Baill.) seedlings were watered with distilled water (CK), leaf water extract (0.025 g mL-1) and branch water extract (0.1 g mL-1) from Cornus controversa, respectively. Subsequently, the morphology, biomass and gene expression levels of DiSOC1-b and DiCCoAOMT1 were analyzed. The results showed that morphological traits and biomass accumulation of D. involucrata seedlings were decreased by the addition of leaf water extracts, and increased by branch water extracts. Moreover, the gene expression level of DiSOC1-b was significantly down-regulated, while the gene expression level of DiCCoAOMT1 was significantly up-regulated in the stems and roots of D. involucrata upon treatment with leaf water extracts of C. controversa. In contrast, the gene expression level of DiSOC1-b was significantly up-regulated in the leaves and stems, while the gene expression level of DiCCoAOMT1 was significantly down-regulated in the roots of D. involucrata upon treatment with branch water extracts of C. controversa. In addition, the expression level of DiSOC1-b was positively correlated with most of morphological traits and total biomass (P < 0.05), while DiCCoAOMT1 was negatively correlated with the majority of morphological traits in D. involucrata seedlings (P < 0.05). Taken together, these results suggest that water extracts from the leaves and branches of the C. controversa exhibit opposite allelopathic effects and affect the expression levels of genes related to growth (DiSOC1-b) and environmental adaptability (DiCCoAOMT1) in D. involucrata seedlings.","PeriodicalId":50085,"journal":{"name":"Journal of Plant Ecology","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140456950","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. S. Costa, T. J. de Vasconcellos, C. Lisi, Arno Fritz Neves Brandes, M. Tomazello-Filho, C. Callado
Allocating resources for reproduction involves ecological and evolutionary factors and can reduce vegetative growth in plants. This interrelationship is not easily observed in nature, as there are many parameters that can limit the production of reproductive structures or the addition of biomass. We related tree-ring width to supra-annual reproductive behaviour of Cedrela odorata L. (Meliaceae) in the Atlantic Forest of Rio de Janeiro State. In general, the development of reproductive structures occurred in wet years, without water deficit at the beginning of the growth season. However, in these years, tree-ring width was smaller. These results may be associated with the lack of correlation between tree-ring width and local climate. In this way, we highlight the importance of incorporating reproductive data in radial growth studies to expand the understanding of growth variability in tropical forests.
{"title":"Interrelationship between tree-ring width and supra-annual reproductive behaviour of Cedrela odorata: an alert for dendrochronological research","authors":"M. S. Costa, T. J. de Vasconcellos, C. Lisi, Arno Fritz Neves Brandes, M. Tomazello-Filho, C. Callado","doi":"10.1093/jpe/rtad048","DOIUrl":"https://doi.org/10.1093/jpe/rtad048","url":null,"abstract":"\u0000 Allocating resources for reproduction involves ecological and evolutionary factors and can reduce vegetative growth in plants. This interrelationship is not easily observed in nature, as there are many parameters that can limit the production of reproductive structures or the addition of biomass. We related tree-ring width to supra-annual reproductive behaviour of Cedrela odorata L. (Meliaceae) in the Atlantic Forest of Rio de Janeiro State. In general, the development of reproductive structures occurred in wet years, without water deficit at the beginning of the growth season. However, in these years, tree-ring width was smaller. These results may be associated with the lack of correlation between tree-ring width and local climate. In this way, we highlight the importance of incorporating reproductive data in radial growth studies to expand the understanding of growth variability in tropical forests.","PeriodicalId":50085,"journal":{"name":"Journal of Plant Ecology","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140470578","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Trade-offs between chemical resistance to herbivory and responses to abiotic stresses in invasive plants","authors":"Lifeng Zhou, Wandong Yin, Jianqing Ding","doi":"10.1093/jpe/rtae007","DOIUrl":"https://doi.org/10.1093/jpe/rtae007","url":null,"abstract":"","PeriodicalId":50085,"journal":{"name":"Journal of Plant Ecology","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139596165","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Wenqi Luo, O. Valverde‐Barrantes, Monique Weemstra, James F Cahill, Zi Wang, Dong He, Yongfa Chen, Chengjin Chu, Youshi Wang
The ecology of plant species relies on the synchronous functioning of leaves and roots, but few studies have simultaneously examined the community trait dispersion patterns (CTD) of both organs. We measured 16 analogous leaf and root traits on 44 co-occurring woody species in a subtropical forest in southern China, examining whether leaf and root traits were coordinated, organized into parallel trait axes, exhibited similar CTD, and displayed consistent responses in CTD and community-weighted means of (CWM) traits over environmental gradients. While the first axes of leaf and root trait variation similarly exhibited a fast – slow continuum, leaf traits covered a secondary ‘carbon economics’ axis, contrasting to root traits depicting a collaboration axis reflecting species’ mycorrhizal dependency. Analogous leaf and root chemical traits were generally coordinated but less so for morphological traits. At the community level, changes in the CWM of the first axes were generally consistent among organs with more conservative traits found as increasing elevation but not for the second axis. While root traits became thinner and more conservative as soil phosphorus decreased, leaf traits rarely varied. When different trait axes were combined, leaf traits were overdispersed but tended to converge with increased elevation and soil potassium and phosphorus levels, whereas root traits were clustered but tended to diverge along the same gradients. Our study highlights fine filtering of different suites of traits above- and below-ground, which in turn might reduce overall niche overlap among species and promote coexistence with diverse functional designs.
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