Forest Systems最新文献_第7页

The mosquito yew wood: Survey and analysis of Mediterranean Taxus baccata L. woods (Habitat 9580*) 蚊用紫杉：地中海红豆杉（生境9580*）调查与分析

IF 0.7 4区农林科学

Forest Systems Pub Date : 2022-03-07 DOI: 10.5424/fs/2022311-18644

R. Balaguer-Romano, Prudencio Férnandez-Gonzalez, A. Alcaide, Jaime Braschi, Fernando Vasco-Encuentra

{"title":"The mosquito yew wood: Survey and analysis of Mediterranean Taxus baccata L. woods (Habitat 9580*)","authors":"R. Balaguer-Romano, Prudencio Férnandez-Gonzalez, A. Alcaide, Jaime Braschi, Fernando Vasco-Encuentra","doi":"10.5424/fs/2022311-18644","DOIUrl":"https://doi.org/10.5424/fs/2022311-18644","url":null,"abstract":"Aim of study: To survey a yew tree grove and to evaluate its conservation status to ascertain whether its proposal to class it as Habitat 9580* is appropriate. \u0000Area of study: Eastern end of Central Mountain Range, Spain. \u0000Material and methods: We conducted a field survey collecting data of UTM coordinates, altitude, orientation, companion woody species, height, stem perimeter, sex and browsing evidence. Individuals were classified in four age groups, considering height and stem perimeter: 1) seedling, 2) juvenile, 3), adult and 4) old. Companion species were analysed to assess the presence of habitat 9580* according to the Habitats Directive. Population structural complexity, stability and compactness were analysed to assess the conservation status. \u0000Main results: We registered 8,304 yews along with seventeen distinctive accompanying species, thus confirming the presence of priority habitat of community interest 9580* \"Mediterranean Taxus baccata woods”. Population analysis leads us to appreciate a favourable conservation status for the whole habitat in the study area. \u0000Research highlights: We have described the largest T. baccata grove registered to date in the Central Mountain Range of the Iberian Peninsula. We confirm the presence of priority habitat of community interest 9580* \"Mediterranean Taxus baccata woods\", being the first description of this habitat in the Community of Madrid. As the study area is located within a Special Area of Conservation (SAC), we propose its inclusion on the SAC habitats list.","PeriodicalId":50434,"journal":{"name":"Forest Systems","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2022-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49257812","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}

引用次数: 1

Growth differential related to wood structure and function of Eucalyptus spp. clones adapted to seasonal drought stress 与桉树木材结构和功能有关的生长差异。适应季节性干旱胁迫的无性系

IF 0.7 4区农林科学

Forest Systems Pub Date : 2021-12-01 DOI: 10.5424/fs/2021303-17908

D. R. Santos

{"title":"Growth differential related to wood structure and function of Eucalyptus spp. clones adapted to seasonal drought stress","authors":"D. R. Santos","doi":"10.5424/fs/2021303-17908","DOIUrl":"https://doi.org/10.5424/fs/2021303-17908","url":null,"abstract":"Aim of the study: To evaluate the growth performance, wood density and anatomical features of four drought-tolerant Eucalyptus spp. clones, at 4 years, and to examine the relationships between these characteristics and some functional parameters. Area of study: The analyzed trees were from a clonal test installed in a region characterized by seasonal drought stress in central-western Brazil. Methods: Trees were felled, followed by obtaining dendrometric parameters and wood disk sampling to determine wood bulk density by x-ray densitometry, and morphometric parameters of fibers and vessels in order to evaluate the xylem hydraulic architecture. Lumen fraction (F), vessel composition (S) and hydraulic conductivity (Ks) were estimated. Results: Clone D (E. urophylla x E grandis) presented the highest growth rates, which was related to anatomical characteristics such as low relative frequency of wide vessels. High theoretical Ks does not necessarily imply higher growth rates and were related to lower wood densities. It is possible to infer that the better xylem adjustability of Eucalyptus trees in response to drought stress conditions is associated with increased vessel composition to the detriment of higher hydraulic conductivity. Research highlights: Vessel composition showed a greater variation among Eucalyptus genotypes and was positively associated with growth performance.","PeriodicalId":50434,"journal":{"name":"Forest Systems","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49291886","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}

引用次数: 1

Biomass equations for rockrose (Cistus laurifolius L.) shrublands in North-central Spain 西班牙中北部岩蔷薇（Cistus laurifolius L.）灌木林的生物量方程

IF 0.7 4区农林科学

Forest Systems Pub Date : 2021-12-01 DOI: 10.5424/fs/2021303-17997

R. Bados

{"title":"Biomass equations for rockrose (Cistus laurifolius L.) shrublands in North-central Spain","authors":"R. Bados","doi":"10.5424/fs/2021303-17997","DOIUrl":"https://doi.org/10.5424/fs/2021303-17997","url":null,"abstract":"Aims of the study: To construct biomass weight equations for rockrose (Cistus laurifolius L.) shrublands in North-central Spain comparing different methodologies and evaluating the applicability of the current Spanish open PNOA-LiDAR data. Area of study: The growing extension of Mediterranean shrublands associated with a high wildfire risk in a climate change scenario is considered a relevant source of biomass for energy use and bioproducts. Quantifying the biomass load of the shrublands provides essential information for adequate management, calling for the development of equations to estimate said biomass loads in the most extensive monospecific shrublands. Materials and methods: Biomass dry weight from 290 destructive sampling plots (ø4m) and 426 individual plants along with LiDAR data from PNOA were related to dasometric parameters to fit weight per surface and weight per plant equations. Main results: Three new equations improve rockrose biomass estimations in North-central Spain: a) Weight per unit area (tDM.ha-1) equation (Eq. 1) based on apparent biovolume (product of crown cover in percentage by average height in meters) (Radj2 0.69, MAE 26.1%, RMSE 38.4%); b) Weight per plant (kgDM.plant-1) equation (Eq. 2) from height and crown diameter (Radj2 0.87, MAE 26.5%, RMSE 45.2%) and c) Weight per unit area equation (tDM.ha-1) (Eq. 3) based on LiDAR data contrasted with field data (Radj2 0.89, MAE 15.1%, RMSE 22.9%). Research highlights: Eq. 1 and Eq. 3 combined with high resolution LiDAR information offer rockrose (Cistus laurifolius L.) biomass estimations without added field work costs that are an improvement on certain more general studies carried out in other areas of Spain.","PeriodicalId":50434,"journal":{"name":"Forest Systems","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41451520","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}

引用次数: 1

Age-age correlations and prediction of early selection age for diameter growth in a 35-years old Pinus brutia Ten. Genetic experiment 35岁粗松直径生长的年龄相关性及早期选择年龄预测[j]。基因实验

IF 0.7 4区农林科学

Forest Systems Pub Date : 2021-12-01 DOI: 10.5424/FS/2021303-17745

Y. Kurt

{"title":"Age-age correlations and prediction of early selection age for diameter growth in a 35-years old Pinus brutia Ten. Genetic experiment","authors":"Y. Kurt","doi":"10.5424/FS/2021303-17745","DOIUrl":"https://doi.org/10.5424/FS/2021303-17745","url":null,"abstract":"Aim of study: Forest geneticists developed various methods to predict an early selection age for forest tree species in order to shorten the breeding cycles. This study aims to estimate age-age correlations among diameter growth of trees at different ages and predict early selection age for Pinus brutia Ten. Area of study: P. brutia populations in the study were sampled from the most productive distribution range of the species, which is an important forest tree in the eastern Mediterranean Basin. To understand genetic variation and determine early selection age for the species, a common garden experiment was established in two test sites near Antalya city, Turkey, in 1979. Materials and methods: Wood increment cores at breast height were collected at age 30 years, and diameters (dbh) were measured for the ages 13, 15, 19, 21, 23, 25, and 27 years on the cores. Diameters at ground level (dgl) and dbh were also measured on live trees at age 35. Variance components, age-age correlations, heritability and selection efficiency were estimated for the diameters. Main results: Age-age genetic correlations for diameters were high (mostly > 0.90). Genetic correlations between dgl (at age 35) and dbh (at all measurement ages) ranged from 0.84 to 0.99. Regressions of genetic correlation on natural log of age ratio (LAR) of juvenile age to older age were significant (P < 0.0001). Selection efficiencies estimated by employing the prediction equation indica ted that for rotation age 40, the optimum selection age would be between 3 to 5 years, and for rotation age 100 it would be between 5 to 9 years. Research highlights: The results of this study provide information that can be used to find early selection ages in P. brutia . On relatively poor test sites most trees may not attain enough height growth to have measurable dbh trait. In such cases, dgl and/or tree height traits (both of which are highly correlated with dbh traits of all ages) can be measured and used instead of dbh trait for evaluations.","PeriodicalId":50434,"journal":{"name":"Forest Systems","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42406341","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}

引用次数: 3

Timing of resin-tapping operations in maritime pine forests in Northern Spain 西班牙北部海上松林树脂开采作业的时间

IF 0.7 4区农林科学

Forest Systems Pub Date : 2021-12-01 DOI: 10.5424/fs/2021303-18414

R. Touza, Extracción de Resina. Lugar de Maúnzo Xeve Pontevedra

引用次数: 3

Persistent fire effect on forest dynamics and species composition of an old-growth tropical forest 持续火灾对热带原生林森林动态和物种组成的影响

IF 0.7 4区农林科学

Forest Systems Pub Date : 2021-12-01 DOI: 10.5424/FS/2021303-16791

Dárlison Fernandes-Carvalho-de-Andrade, Bloco “B” Complexo Administrativo Setor Sudoeste . Brasí Brazil

{"title":"Persistent fire effect on forest dynamics and species composition of an old-growth tropical forest","authors":"Dárlison Fernandes-Carvalho-de-Andrade, Bloco “B” Complexo Administrativo Setor Sudoeste . Brasí Brazil","doi":"10.5424/FS/2021303-16791","DOIUrl":"https://doi.org/10.5424/FS/2021303-16791","url":null,"abstract":"Aim of study: To assess structure, recruitment and mortality rates of tree species over almost three decades, 14 years before and 15 years after a forest fire. Materials and methods: All trees ≥ 5 cm in DBH were identified and measured in 12 permanent plots (50 m x 50 m), in 1983, 1987, 1989, 1995, 2008, and 2012 of a dense ombrophilous forest in Eastern Amazon, Brazil. The analyses were carried out including all sampled species and their ecological groups: shade-tolerant, light-demanding, and pioneer species. Treatments were compared through a Linear Mixed Effect Model. Main results: The 15-year post-fire period is not enough for the old-growth tropical forest to recover its pre-fire conditions of recruitment and mortality rates. The post-fire recruitment and mortality rates increased, mainly the recruitment of pioneer species ( p- value < 0.05). Research highlights: In a period of 15 years after the occurrence of a surface fire, the old-growth tropical forest still has high recruitment rates of shade-tolerant and light-demanding species and high incidence of pioneer species, confirming the persistent fire effects on forest dynamics and species composition in this ecosystem. Abbreviations used: DBH (diameter at 1.3 m from the ground); D (density); G (basal area); EG (ecological group); ST (shade-tole -rant); LD (light-demanding); Pi (pioneer); Ni (non-identified ecological group); MR (mortality rates); RR (recruitment rates); LMM (Linear Mixed Effect Model).","PeriodicalId":50434,"journal":{"name":"Forest Systems","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44307817","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}

引用次数: 1

Drought responsiveness in two Mexican conifer species forming young stands at high elevations 两种墨西哥针叶树在高海拔地区形成幼林的干旱响应

IF 0.7 4区农林科学

Forest Systems Pub Date : 2021-12-01 DOI: 10.5424/FS/2021303-18371

Eduardo D. Vivar-Vivar

{"title":"Drought responsiveness in two Mexican conifer species forming young stands at high elevations","authors":"Eduardo D. Vivar-Vivar","doi":"10.5424/FS/2021303-18371","DOIUrl":"https://doi.org/10.5424/FS/2021303-18371","url":null,"abstract":"Aim of study: To determine the response of high-altitudinal forests to seasonal drought. Area of study: Monte Tláloc, Estado de México and Rancho del Durazno, Municipality of Río Verde, San Luis Potosí, México. Materials and methods: In this study, we evaluate the response to drought and hydroclimate in two young Mexican conifers sampled at high elevation, correlating records of tree-ring growth and the Normalized Difference Vegetation Index (NDVI). Main results: The results show that Pinus teocote and Abies religiosa are vulnerable to the precipitation regime and warm conditions of winter-spring. The physiological response mechanisms seem to be differentiated between the species, according to the effects of drought stress. The NDVI demonstrated the different temporal responses of the species according to their inherent physiological mechanisms in response to hydroclimatic limitations. This differentiation can be attributed to the spatial variation present in the particular physical and geographic conditions of each area. The dry and warm seasonal climates reveal P. teocote and A. religiosa to be species that are vulnerable to drought conditions. However, further evaluation of the resistance and resilience of these species is necessary, as well as disentanglement of the effects of associated mechanisms that can influence the predicted processes of extinction or migration. Research highlights: Pinus teocote and Abies religiosa are vulnerable to the seasonal drought conditions. These results are of particular importance given the climatic scenarios predicted for elevated ecotones. Tree-ring widths and NDVI improved the response of radial growth to the climate, enhancing our understanding of forest growth dynamics. The response to climatic variability depends on the particular species.","PeriodicalId":50434,"journal":{"name":"Forest Systems","volume":"30 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42380066","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}

引用次数: 6

Sources of phenotypic variation of wood density and relationships with mean growth in two Eucalyptus species in Argentina 阿根廷两种桉树树种木材密度表型变异的来源及其与平均生长的关系

IF 0.7 4区农林科学

Forest Systems Pub Date : 2021-12-01 DOI: 10.5424/fs/2021303-17208

P. Alarcón

{"title":"Sources of phenotypic variation of wood density and relationships with mean growth in two Eucalyptus species in Argentina","authors":"P. Alarcón","doi":"10.5424/fs/2021303-17208","DOIUrl":"https://doi.org/10.5424/fs/2021303-17208","url":null,"abstract":"Aims of the study: To describe the radial patterns of wood density, and to identify their main sources of variation, and the potential tradeoffs with mean tree growth, in two Eucalyptus species. Area of study: Mesopotamian (Corrientes and Entre Ríos provinces) and Pampean region (Buenos Aires province) of Argentina. Materials and methods: Eucalyptus grandis and Eucalyptus viminalis, growing in genetic trials installed in two sites per species were studied. X-ray wood microdensity profiles were developed from core samples. Each profile was proportionally divided in 10 sections. Mean, maximum, minimum and the standard deviation of wood density, for each section were computed. Mean annual growth was used to study the relationships with wood microdensity variables. A linear mixed-effects model computed the significance of different sources of phenotypic variation. Pearson´s correlation computed the relationships between variables. Main results: The pattern of radial variation in E. grandis showed a decrease in wood density from pith to bark, mainly due to the decrease in minimum wood density, while in E. viminalis, wood density increased towards the outer wood. In both species, the standard deviation of the wood density increased along the radial profile from pith to bark. Significant variation in wood density was explained by site, provenance and clone/family effects. In E. grandis mean, maximum and minimum wood density were negatively correlated with mean growth, whereas in E. viminalis correlations were positive but close to zero. Research highlights: Both the pattern of radial variation of wood density and the relationship between wood density and mean growth were different in the studied Eucalyptus species, and they varied within species depending on the site they were growing and genetic provenance.","PeriodicalId":50434,"journal":{"name":"Forest Systems","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43267294","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}

引用次数: 0

Tree-ring reconstruction of March-June precipitation from the Atlas cedar forest of Mount Takoucht, Béjaïa (northern Algeria) 阿尔及利亚北部Takoucht山(Béjaïa)阿特拉斯雪松林3 - 6月降水的年轮重建

IF 0.7 4区农林科学

Forest Systems Pub Date : 2021-12-01 DOI: 10.5424/FS/2021303-18111

S. Slimani

{"title":"Tree-ring reconstruction of March-June precipitation from the Atlas cedar forest of Mount Takoucht, Béjaïa (northern Algeria)","authors":"S. Slimani","doi":"10.5424/FS/2021303-18111","DOIUrl":"https://doi.org/10.5424/FS/2021303-18111","url":null,"abstract":"Aim of study: A March-June precipitation has been reconstructed for the period 1830-2015 using Atlas cedar ( Cedrus atlantica Manetti) tree-ring records. Area of study: Atlas cedar forest of Mount Takoucht (Béjaïa, northern Algeria). Materials and methods: Seasonal correlations were computed in order to identify the best period of the year for the climate reconstruction. The temporal stability of the tree-ring signal for precipitation was checked using the split-sample calibration-verification procedure. The reconstruction was performed using the transfer function method. Main results: The reconstructed data revealed high interannual to decadal variation in late winter to early summer precipitation. Wet conditions dominated during the 1830s and 1840s and were followed by sustained dry conditions during the mid-19 th century, which registered two of the most severe droughts (1858 and 1869) over the period of reconstruction. Relatively moderate climate conditions marked the late 19 th and early 20 th centuries. A gradual return towards drier conditions was observed from the 1920s and reached high frequencies of drought around mid-20 th century. After an exceptional prolonged wet period of 24 years (1966-1989), the reconstruction registered its highest frequency in extreme dry/wet events: the decade 1993-2002 recorded the highest drought frequency of the reconstruction, with the third most severe dry event (1999), while the last years were marked by a clear shift toward wet conditions. Research highlights: These findings provide relevant records on past climate variability in one of the rainiest areas in Algeria and cons titute valuable knowledge for specific drought and wet periods monitoring in the region.","PeriodicalId":50434,"journal":{"name":"Forest Systems","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43096408","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}

引用次数: 0

Formamide deionized accelerates the somatic embryogenesis of Cunninghamia lanceolata 甲酰胺去离子化对杉木体细胞胚胎发生有促进作用

IF 0.7 4区农林科学

Forest Systems Pub Date : 2021-12-01 DOI: 10.5424/fs/2021303-18068

Shi-hong He

引用次数: 0