Journal of Arid Environments最新文献_第2页

Cactus (Opuntia ficus-indica) diets reduce voluntary water intake, water footprint and enteric methane production improving ruminal fermentation in steers

IF 2.6 3区环境科学与生态学

Journal of Arid Environments Pub Date : 2025-01-15 DOI: 10.1016/j.jaridenv.2024.105311

Aghata E.M. da Silva , Arturo Macias Franco , Juan K.Q. Solomon , Lucien B. da Freiria , Felipe H. de Moura , Pedro H.S. Mazza , Bianca Birkenstock , Leilson R. Bezerra , Teshome Shenkoru , Mozart A. Fonseca

{"title":"Cactus (Opuntia ficus-indica) diets reduce voluntary water intake, water footprint and enteric methane production improving ruminal fermentation in steers","authors":"Aghata E.M. da Silva , Arturo Macias Franco , Juan K.Q. Solomon , Lucien B. da Freiria , Felipe H. de Moura , Pedro H.S. Mazza , Bianca Birkenstock , Leilson R. Bezerra , Teshome Shenkoru , Mozart A. Fonseca","doi":"10.1016/j.jaridenv.2024.105311","DOIUrl":"10.1016/j.jaridenv.2024.105311","url":null,"abstract":"<div><div>We investigated the viability of <em>Opuntia ficus indica</em> (or cactus), as nutritional substitute for alfalfa (<em>Medicago sativa</em>) and orchardgrass (<em>Dactylis glomerata</em>) hays, assessing its effects on greenhouse gas emissions, water intake, and water footprint. Fermentation kinetics were assessed using <em>in vitro</em> gas production technique with two ruminally cannulated Angus steers as inoculum donors. Forage types were incubated in serum bottles over three runs for 48 h to analyze fermentation characteristics. In vitro digestion kinetics evaluated cactus forage inclusion at 40%, 60%, 80%, and 100% on a dry matter basis. Computer simulations estimated the of cactus diets on water usage. Data were analyzed as completely randomized design, with diet as fixed and runs as random effects. Results showed cactus reduced CH<sub>4</sub> and increased CO<sub>2</sub> production higher with cactus compared to hay (P < 0.05). Rumen pH, propionate, and digestibility increased with cactus inclusion, while acetate, isobutyrate, isovalerate, and valerate decreased in orchardgrass diets (P < 0.05). Cactus also reduced water intake and footprint (P < 0.001), offering a viable option to lower methane emissions without affecting cattle performance. Cactus fermentation enhances digestibility and propionate production and produces less methane compared to alfalfa and orchardgrass while still maintaining high dry matter digestibility.</div></div>","PeriodicalId":51080,"journal":{"name":"Journal of Arid Environments","volume":"227 ","pages":"Article 105311"},"PeriodicalIF":2.6,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143137229","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

引用次数: 0

Seasonal balance of whole plant non-structural carbohydrates in a deciduous species with green stem in a dry tropical forest

IF 2.6 3区环境科学与生态学

Journal of Arid Environments Pub Date : 2025-01-13 DOI: 10.1016/j.jaridenv.2025.105324

Adglecianne Melo, Joana Nicodemos, Rafaela F. Lopes, Mauro G. Santos

{"title":"Seasonal balance of whole plant non-structural carbohydrates in a deciduous species with green stem in a dry tropical forest","authors":"Adglecianne Melo, Joana Nicodemos, Rafaela F. Lopes, Mauro G. Santos","doi":"10.1016/j.jaridenv.2025.105324","DOIUrl":"10.1016/j.jaridenv.2025.105324","url":null,"abstract":"<div><div>We investigated the dynamics of non-structural carbohydrates (NSC) in a deciduous species with a green stem, under semiarid seasonality. The predawn xylem water potential (Ψ<sub>x</sub>) always remained high (≥−0.5 MPa). However, the NSC total concentration was reduced by approximately 75% when the plants were leafless. Stomatal conductance, leaf and stem photochemical activity, and mineral nutrition varied under the seasonality. Stomata had greater conductance when the soil water balance was positive. In the driest year, lower nutrient concentrations were found in the leaves, and higher concentrations were found in the stems than in the wettest year. <em>Commiphora leptophloeos</em> has a phenology that promotes leaf fall at the beginning of the dry season and regrowth of new leaves at the end of the dry season, following the photoperiod and not soil water availability. Due to deciduousness, the plants maintained a high Ψ<sub>x</sub>, however, the green stem seems to have only contributed to maintaining the concentration of stored starch. Such behavior could increase the susceptibility of this species to prolonged drought season, as predicted for the semiarid regions. Thus, sprouting new leaves still during the dry season would deplete the NSC stock and increase water loss.</div></div>","PeriodicalId":51080,"journal":{"name":"Journal of Arid Environments","volume":"227 ","pages":"Article 105324"},"PeriodicalIF":2.6,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143137225","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

引用次数: 0

Integrating pastoralism and tourism in Fafen Zone of Somali region, Ethiopia: opportunities and barriers

IF 2.6 3区环境科学与生态学

Journal of Arid Environments Pub Date : 2025-01-10 DOI: 10.1016/j.jaridenv.2025.105320

Mohammed Jemal Ahmed

{"title":"Integrating pastoralism and tourism in Fafen Zone of Somali region, Ethiopia: opportunities and barriers","authors":"Mohammed Jemal Ahmed","doi":"10.1016/j.jaridenv.2025.105320","DOIUrl":"10.1016/j.jaridenv.2025.105320","url":null,"abstract":"<div><div>The traditional pastoralist way of life and economy is threatened. However, this threat can be addressed and potentially reversed by integrating pastoralism with tourism. Leveraging the commercial opportunities between pastoralists and tourists can contribute to environmental preservation in rural regions while simultaneously boosting economic growth. This study seeks to assess the symbiotic relationship between tourism and pastoralism. The article discusses the primary methods for combining pastoralism and tourism, as well as the challenges that exist, with an emphasis on Ethiopia's Somali Region's Fafen Zone. In this study, a qualitative approach was used. Results indicate promising prospects for aligning pastoralism with tourism in the area. Examples include the development of modern hotels in Jigjiga city, potential eastern tourism routes, and the relative stability and infrastructure improvements in the Fafen zone, all of which offer economic and social advantages. However, progress may be hindered by challenges such as negative perceptions of the region, limited tourism industry expertise, inadequate infrastructure, and insufficient promotional efforts. Policymakers should consider the link between pastoralism and tourism, encouraging greater involvement from pastoralists and stakeholders, and establishing multi-stakeholder analyses to tackle policy shortcomings and foster collaboration.</div></div>","PeriodicalId":51080,"journal":{"name":"Journal of Arid Environments","volume":"227 ","pages":"Article 105320"},"PeriodicalIF":2.6,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143137231","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

引用次数: 0

Effects of conspecific and congeneric soils and litters on the nodulation and growth of non-native invasive and native Prosopis species in arid deserts

IF 2.6 3区环境科学与生态学

Journal of Arid Environments Pub Date : 2025-01-09 DOI: 10.1016/j.jaridenv.2025.105319

Ali El-Keblawy , Elsiddig A.E. Elsheikh , Ana Novoa , Ross T. Shackleton , Mohamed Sheteiwy , Salma K. Shaltout

{"title":"Effects of conspecific and congeneric soils and litters on the nodulation and growth of non-native invasive and native Prosopis species in arid deserts","authors":"Ali El-Keblawy , Elsiddig A.E. Elsheikh , Ana Novoa , Ross T. Shackleton , Mohamed Sheteiwy , Salma K. Shaltout","doi":"10.1016/j.jaridenv.2025.105319","DOIUrl":"10.1016/j.jaridenv.2025.105319","url":null,"abstract":"<div><div>Allelochemical production is a plausible mechanism promoting the invasion of <em>Prosopis</em> species in their introduced ranges. This study assessed how allelopathy affects the nodulation and growth of non-native <em>Prosopis</em> species (<em>P. juliflora</em> and <em>P. pallida</em>) and native <em>P. cineraria</em> congeners in the United Arab Emirates (UAE). In two experiments, seeds of the three <em>Prosopis</em> species were grown in conspecific and congeneric soils, and litter was collected from underneath their canopies. <em>Prosopis juliflora</em> and <em>P. pallida</em> seedlings, on average, formed a higher number of nodules than native <em>P. cineraria</em> seedlings. <em>Prosopis juliflora</em> seedlings had the heaviest dry shoots and nodules, whereas <em>P. pallida</em> had the heaviest dry roots. The soil source played an important role in the nodule production of each species, with <em>P. pallida</em> and <em>P. cineraria</em> seedlings producing more nodules when growing in conspecific soils. Nodulation and growth were generally reduced across all species when conspecific litters were added, with <em>P. juliflora</em> being the least affected. The success of non-native invasive <em>Prosopis</em> trees in their introduced ranges could be attributed to their capacity to nodulate profusely and to use the biologically fixed nitrogen to enhance aboveground growth in soils with low nitrogen content.</div></div>","PeriodicalId":51080,"journal":{"name":"Journal of Arid Environments","volume":"227 ","pages":"Article 105319"},"PeriodicalIF":2.6,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143137227","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

引用次数: 0

Hidden biodiversity: Dryland soil seed banks across ecological sites and states

IF 2.6 3区环境科学与生态学

Journal of Arid Environments Pub Date : 2025-01-09 DOI: 10.1016/j.jaridenv.2024.105307

Kirsten B. Romig , Darren K. James , Connie J. Maxwell , Brandon T. Bestelmeyer , Joel R. Brown , Shawn W. Salley , Akasha M. Faist

{"title":"Hidden biodiversity: Dryland soil seed banks across ecological sites and states","authors":"Kirsten B. Romig , Darren K. James , Connie J. Maxwell , Brandon T. Bestelmeyer , Joel R. Brown , Shawn W. Salley , Akasha M. Faist","doi":"10.1016/j.jaridenv.2024.105307","DOIUrl":"10.1016/j.jaridenv.2024.105307","url":null,"abstract":"<div><div>Grassland degradation can hinder global dryland ecosystems with aboveground vegetation a key indicator of transitions from a healthy reference state to undesirable, or degraded states. The soil seed bank may either mirror, or diverge, from its associated aboveground vegetation. To better understand this relationship, we examined vegetation and seed banks across soil types (ecological sites) and vegetation/soil states (ecological states). To assess the soil seed bank, we sampled replicate soil seed bank collections across 67 individual ecological site and state combinations in the northern Chihuahuan Desert U.S.A. We found low species overlap between aboveground vegetation and the soil seed bank ranging from 0% to 30%. Sand dominated ecological sites contained the highest seed densities, yet densities and richness did not differ markedly across most vegetation states within an ecological site. The soil seed bank was dominated by perennial native grasses (>69%) with a low proportion (3%) of shrub seeds. Results indicate that irrespective of degradation levels, functional groups characteristic of historical native grasslands persist in the seed bank. Understanding soil seed bank biodiversity and how it relates to edaphic gradients and degrees of land degradation provides insight into the restoration potential of degraded arid ecosystems in a changing climate.</div></div>","PeriodicalId":51080,"journal":{"name":"Journal of Arid Environments","volume":"227 ","pages":"Article 105307"},"PeriodicalIF":2.6,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143136705","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

引用次数: 0

Cattle effects on seed dispersal, germination, and seedling recruitment of a threatened brazilian dry forest palm tree (Syagrus coronata)

IF 2.6 3区环境科学与生态学

Journal of Arid Environments Pub Date : 2025-01-09 DOI: 10.1016/j.jaridenv.2025.105323

Uriel de Jesus Araújo Pinto , Bianca Santana Dias Nascimento , Jhonathan de Oliveira Silva , Priscyla Maria Silva Rodrigues

{"title":"Cattle effects on seed dispersal, germination, and seedling recruitment of a threatened brazilian dry forest palm tree (Syagrus coronata)","authors":"Uriel de Jesus Araújo Pinto , Bianca Santana Dias Nascimento , Jhonathan de Oliveira Silva , Priscyla Maria Silva Rodrigues","doi":"10.1016/j.jaridenv.2025.105323","DOIUrl":"10.1016/j.jaridenv.2025.105323","url":null,"abstract":"<div><div><em>Syagrus coronata</em> (Arecaceae) is a palm widely distributed throughout the Brazilian semi-arid region presenting high sociocultural, economic, and ecological importance. Anthropogenic disturbances have led to a defaunation of wild birds and mammal dispersers, compromising the seedling recruitment. Herein, we verified the livestock effects on <em>S. coronata</em> dispersal, germination, and establishment of regenerant stages in dry forest vegetation and pasture. Seed dispersal was assessed using 72 experimental arenas for measuring dung beetles’ functions facilitated by cattle. We applied a completely randomized design for the germination experiment with 400 seeds divided into four groups: 1) control, 2) mechanically scarified seeds, 3) seeds ingested by cattle and recovered from feces, and 4) seeds both ingested by cattle and mechanically scarified. We assessed the survival rates of regenerating <em>S. coronata</em> individuals (seedlings, saplings, and juveniles) in 40 plots (20 × 20 m) over a year. We found cattle as a potential disperser and facilitator of secondary dispersal for 43% of seeds, mainly in pastures. Mechanical scarification treatment reached the greatest germination percentage. Seed passage through the digestive tract of cattle treatment increased germination compared with the control. In contrast, combining mechanical and digestive bovine tract scarification damages the seeds. There was a negative cattle effect on survival of regenerants, in which their establishment is a crucial stage in the life cycle of palms. This study provides information for farming practices in areas of extractive use, contributing to <em>S. coronata</em> population conservation.</div></div>","PeriodicalId":51080,"journal":{"name":"Journal of Arid Environments","volume":"227 ","pages":"Article 105323"},"PeriodicalIF":2.6,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143137226","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

引用次数: 0

Habitat distribution modelling to identify areas of high conservation value under climate change for an endangered arid land tree Tecomella undulata

IF 2.6 3区环境科学与生态学

Journal of Arid Environments Pub Date : 2025-01-08 DOI: 10.1016/j.jaridenv.2025.105317

Jereem Thampan , Jyoti Srivastava , Pooja Nitin Saraf , Pujarini Samal

{"title":"Habitat distribution modelling to identify areas of high conservation value under climate change for an endangered arid land tree Tecomella undulata","authors":"Jereem Thampan , Jyoti Srivastava , Pooja Nitin Saraf , Pujarini Samal","doi":"10.1016/j.jaridenv.2025.105317","DOIUrl":"10.1016/j.jaridenv.2025.105317","url":null,"abstract":"<div><div>The dryland ecosystems are fragile and have recently been subjected to paradigm shifts by climate change. To analyse this, we selected <em>Tecomella undulata,</em> an endangered arid land tree that adapts to the harsh climates of drylands. We collected 111 extant occurrence records of the species and utilised 16 environmental variables. The study identified that bio12, bio8, altitude, total nitrogen, CEC, and bio15 are the factors that significantly influence the distribution range and modelled species distribution ranges from LGM to 2100 using the Species Distribution Model. The model showed a decreased distribution from the past and predicts an increased distribution for the future. The reduced temperature and increased bio12 acted as limiting factors in the past, while the increase in bio15 and bio8 will act as enhancing factors for the future because of the warming effect due to climate change. The results predict that future climatic conditions will favour the species’ distribution. Therefore, the factors which might limit the species distribution will be anthropogenic, genetic, or pest-related, which was beyond the scope of our study and needs to be identified urgently to conserve the species. The study identified priority conservation areas where environmental factors suit the species. Still, most fall outside the current conservation sites, necessitating more regional conservation sites.</div></div>","PeriodicalId":51080,"journal":{"name":"Journal of Arid Environments","volume":"227 ","pages":"Article 105317"},"PeriodicalIF":2.6,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143137230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

引用次数: 0

Thriving in extremes: Adaptability potential of desert cotton Aerva javanica to hyper-arid saline conditions

IF 2.6 3区环境科学与生态学

Journal of Arid Environments Pub Date : 2025-01-07 DOI: 10.1016/j.jaridenv.2025.105321

Ummar Iqbal, Sana Abid, Muhammad Sharif, Sadaf Rafiq, Abdul Wahab, Mehboob Ahmad, Muhammad Yousuf

{"title":"Thriving in extremes: Adaptability potential of desert cotton Aerva javanica to hyper-arid saline conditions","authors":"Ummar Iqbal, Sana Abid, Muhammad Sharif, Sadaf Rafiq, Abdul Wahab, Mehboob Ahmad, Muhammad Yousuf","doi":"10.1016/j.jaridenv.2025.105321","DOIUrl":"10.1016/j.jaridenv.2025.105321","url":null,"abstract":"<div><div><em>Aerva javanica</em> is a typical C<sub>4</sub> recretohalophyte predominantly found in the hyper-arid saline regions of the Cholistan Desert (Pakistan) and its adjoining areas. Ten populations were gathered from natural habitats to assess adaptive strategies, aiming to rehabilitate hypersaline environments. Desert populations have thicker epidermal layers, enlarged oil glands, stomata, and trichomes, along with reduced thickness of the leaf midrib and lamina, which are essential for surviving extreme aridity. Their deeper roots and increased biomass indicate resistance to environmental stress. Semi-desert populations feature enlarged vascular bundles and thicker leaves for better water conservation, while agricultural populations have smaller stomata and trichomes and larger leaves with longer shoots. Key features include glandular and non-glandular trichomes, oil gland formation, a bundle sheath cell layer indicative of C<sub>4</sub> physiology, vascular region partitioning by internal parenchyma, and variations in stomatal size and shape, all enhancing species survival in harsh desert conditions. Principal component analysis indicated that trichome area and stomatal area were positively correlated with soil sodium and electrical conductivity, while trichome number and stomatal density correlated with soil pH. Overall, the adaptive traits of <em>A</em>. <em>javanica</em> could provide key insights for breeding salt-tolerant crops, facilitating the successful cultivation of saline lands.</div></div>","PeriodicalId":51080,"journal":{"name":"Journal of Arid Environments","volume":"227 ","pages":"Article 105321"},"PeriodicalIF":2.6,"publicationDate":"2025-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143136662","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

引用次数: 0

Semiarid woody plant functional groups contribute differently to canopy conductance

IF 2.6 3区环境科学与生态学

Journal of Arid Environments Pub Date : 2025-01-07 DOI: 10.1016/j.jaridenv.2025.105318

Angela Lucena Nascimento de Jesus , Nielson Dinivan da Silva Brito , Maria Medeiros , Eduardo Soares de Souza , André Luiz Alves de Lima

{"title":"Semiarid woody plant functional groups contribute differently to canopy conductance","authors":"Angela Lucena Nascimento de Jesus , Nielson Dinivan da Silva Brito , Maria Medeiros , Eduardo Soares de Souza , André Luiz Alves de Lima","doi":"10.1016/j.jaridenv.2025.105318","DOIUrl":"10.1016/j.jaridenv.2025.105318","url":null,"abstract":"<div><div>The continuous exploitation of tropical dry forests has caused changes in the hydrological cycle. Although the vegetation-atmosphere relationship is climatically important, studies evaluating the contribution of plant functional groups to canopy conductance remain scarce. This study aimed to evaluate the relationship between the morphophysiological characteristics of different plant functional groups and canopy conductance in a semi-arid region. We assessed canopy conductance, stomatal conductance, leaf temperature, water potential, and xylem vessel biometry in high wood density species (HWD) and low wood density species (LWD). Using repeated measures analysis of variance and <em>Pearson's</em> correlation analysis, we found a strong positive correlation between stomatal conductance and canopy conductance (<em>ρ</em> = 0.917). The HWD group exhibited a higher number of xylem vessels (90%) and thicker vessel walls (37%). These traits enabled greater stomatal conductance activity (66%) throughout the season (dry/rainy). Conversely, the LWD group had wider vessel lumens (47%), which facilitated higher stomatal conductance during the rainy season (33.3%) and increased water potential (70%). These findings demonstrate that functional groups contribute differently to canopy conductance and highlight the importance of functional diversity for maintaining ecohydrological systems in dry forests.</div></div>","PeriodicalId":51080,"journal":{"name":"Journal of Arid Environments","volume":"227 ","pages":"Article 105318"},"PeriodicalIF":2.6,"publicationDate":"2025-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143137228","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

引用次数: 0

Leaf traits of the mistletoe Erianthemum dregei and its host tree Sclerocarya birrea vary across a rainfall gradient and levels of hemiparasite infection

IF 2.6 3区环境科学与生态学

Journal of Arid Environments Pub Date : 2025-01-06 DOI: 10.1016/j.jaridenv.2024.105308

Tsitsi Sithandiwe Maponga , Hilton Garikai Taambuka Ndagurwa , Dave Ian Thompson , Justice Muvengwi , Wayne Twine , Ed T.F. Witkowski

{"title":"Leaf traits of the mistletoe Erianthemum dregei and its host tree Sclerocarya birrea vary across a rainfall gradient and levels of hemiparasite infection","authors":"Tsitsi Sithandiwe Maponga , Hilton Garikai Taambuka Ndagurwa , Dave Ian Thompson , Justice Muvengwi , Wayne Twine , Ed T.F. Witkowski","doi":"10.1016/j.jaridenv.2024.105308","DOIUrl":"10.1016/j.jaridenv.2024.105308","url":null,"abstract":"<div><div>Certain trees in semi-arid environments are surpassing their physiological thresholds because of erratic rainfall and rising global temperatures. Mistletoes (Loranthaceae) may also be making large trees more susceptible to the physiological stress imposed by climate change. Therefore, we examined intraspecific variations of selected leaf traits of the mistletoe, <em>Erianthemum dregei,</em> and <em>Sclerocarya birrea</em> host trees along a rainfall gradient at three levels of mistletoe infection. We measured seven leaf traits across five mistletoe-host pairs at low, medium, and high rainfall sites. Rainfall had significant effects on all measured traits, except host leaf succulence. Hosts were more resource-acquisitive at intermediate rainfall, but more conservative at high rainfall. The reverse is true for mistletoes. Mistletoe infection only had an effect on host leaf area, specific leaf area, and stomatal conductance, but most mistletoe leaf traits were significantly influenced by infection intensity. Uninfected hosts were more resource-conservative, but highly infected hosts were resource-acquisitive. Conversely, mistletoes on low-infected hosts were associated with high resource acquisition, while those on high-infection trees were resource-conservative. Therefore, the antagonistic response of host trees and mistletoes to infection and rainfall suggests the potential for resilience to environmental change.</div></div>","PeriodicalId":51080,"journal":{"name":"Journal of Arid Environments","volume":"227 ","pages":"Article 105308"},"PeriodicalIF":2.6,"publicationDate":"2025-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143136707","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

引用次数: 0