Marina Efigenia Gonçalves, Geane Cristina Eugenio Viegas, Nayara Magry Jesus Melo, João Paulo Souza
{"title":"在eCO2环境下,黄花双模andra wilsonii幼树茎叶生物量分配的变化可能会对这一濒危物种造成危害","authors":"Marina Efigenia Gonçalves, Geane Cristina Eugenio Viegas, Nayara Magry Jesus Melo, João Paulo Souza","doi":"10.1111/1442-1984.12440","DOIUrl":null,"url":null,"abstract":"Abstract Climate change is among the main threats to ecosystems, affecting biodiversity and ecosystem services. These changes are associated with increased atmospheric carbon dioxide concentration ([CO 2 ]). This study aimed to investigate how [CO 2 ] influences chlorophyll a fluorescence, vegetative growth, biomass production, and the number of root nodules (NRN) of Dimorphandra wilsonii , a critically endangered species. The study was conducted in six open‐top chambers with two CO 2 levels, at elevated [CO 2 ] (eCO 2 , 717 ± 77 ppm) and at ambient [CO 2 ] (aCO 2 , 539 ± 42 ppm). We monitored vegetative growth weekly, and at the end of the experiment, we measured chlorophyll a fluorescence and biomass production. Dimorphandra wilsonii plants under eCO 2 showed higher ( p < 0.05) average leaf dry mass, average leaf area, and lower ( p < 0.05) root/shoot ratio than plants under aCO 2 . The greater aerial biomass allocation contributes to maximizing the photosynthesis performance but could also result in the self‐shading of old basal leaves by new distal leaves on branches. This adjustment could be advantageous in the competition for light; however, it would be a disadvantage for below‐ground resource competition (such as water and nutrients), which could result in decreased drought resistance. Also, this adjustment would be unfavorable to D. wilsonii , which occurs in a seasonal climate environment competing with invasive grasses. Thus, it is possible that climate change scenarios with increases in [CO 2 ] and drought periods could negatively influence the establishment of young plants of D. wilsonii in their natural occurrence area, which could worsen the conservation status of the species.","PeriodicalId":54601,"journal":{"name":"Plant Species Biology","volume":null,"pages":null},"PeriodicalIF":1.1000,"publicationDate":"2023-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"The change in the biomass allocation to stems and leaves in young plants of <i>Dimorphandra wilsonii</i> under <scp>eCO<sub>2</sub></scp> may harm this endangered species in native areas\",\"authors\":\"Marina Efigenia Gonçalves, Geane Cristina Eugenio Viegas, Nayara Magry Jesus Melo, João Paulo Souza\",\"doi\":\"10.1111/1442-1984.12440\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Abstract Climate change is among the main threats to ecosystems, affecting biodiversity and ecosystem services. These changes are associated with increased atmospheric carbon dioxide concentration ([CO 2 ]). This study aimed to investigate how [CO 2 ] influences chlorophyll a fluorescence, vegetative growth, biomass production, and the number of root nodules (NRN) of Dimorphandra wilsonii , a critically endangered species. The study was conducted in six open‐top chambers with two CO 2 levels, at elevated [CO 2 ] (eCO 2 , 717 ± 77 ppm) and at ambient [CO 2 ] (aCO 2 , 539 ± 42 ppm). We monitored vegetative growth weekly, and at the end of the experiment, we measured chlorophyll a fluorescence and biomass production. Dimorphandra wilsonii plants under eCO 2 showed higher ( p < 0.05) average leaf dry mass, average leaf area, and lower ( p < 0.05) root/shoot ratio than plants under aCO 2 . The greater aerial biomass allocation contributes to maximizing the photosynthesis performance but could also result in the self‐shading of old basal leaves by new distal leaves on branches. This adjustment could be advantageous in the competition for light; however, it would be a disadvantage for below‐ground resource competition (such as water and nutrients), which could result in decreased drought resistance. Also, this adjustment would be unfavorable to D. wilsonii , which occurs in a seasonal climate environment competing with invasive grasses. Thus, it is possible that climate change scenarios with increases in [CO 2 ] and drought periods could negatively influence the establishment of young plants of D. wilsonii in their natural occurrence area, which could worsen the conservation status of the species.\",\"PeriodicalId\":54601,\"journal\":{\"name\":\"Plant Species Biology\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":1.1000,\"publicationDate\":\"2023-11-03\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Plant Species Biology\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1111/1442-1984.12440\",\"RegionNum\":4,\"RegionCategory\":\"生物学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"ECOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Plant Species Biology","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1111/1442-1984.12440","RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ECOLOGY","Score":null,"Total":0}
The change in the biomass allocation to stems and leaves in young plants of Dimorphandra wilsonii under eCO2 may harm this endangered species in native areas
Abstract Climate change is among the main threats to ecosystems, affecting biodiversity and ecosystem services. These changes are associated with increased atmospheric carbon dioxide concentration ([CO 2 ]). This study aimed to investigate how [CO 2 ] influences chlorophyll a fluorescence, vegetative growth, biomass production, and the number of root nodules (NRN) of Dimorphandra wilsonii , a critically endangered species. The study was conducted in six open‐top chambers with two CO 2 levels, at elevated [CO 2 ] (eCO 2 , 717 ± 77 ppm) and at ambient [CO 2 ] (aCO 2 , 539 ± 42 ppm). We monitored vegetative growth weekly, and at the end of the experiment, we measured chlorophyll a fluorescence and biomass production. Dimorphandra wilsonii plants under eCO 2 showed higher ( p < 0.05) average leaf dry mass, average leaf area, and lower ( p < 0.05) root/shoot ratio than plants under aCO 2 . The greater aerial biomass allocation contributes to maximizing the photosynthesis performance but could also result in the self‐shading of old basal leaves by new distal leaves on branches. This adjustment could be advantageous in the competition for light; however, it would be a disadvantage for below‐ground resource competition (such as water and nutrients), which could result in decreased drought resistance. Also, this adjustment would be unfavorable to D. wilsonii , which occurs in a seasonal climate environment competing with invasive grasses. Thus, it is possible that climate change scenarios with increases in [CO 2 ] and drought periods could negatively influence the establishment of young plants of D. wilsonii in their natural occurrence area, which could worsen the conservation status of the species.
期刊介绍:
Plant Species Biology is published four times a year by The Society for the Study of Species Biology. Plant Species Biology publishes research manuscripts in the fields of population biology, pollination biology, evolutionary ecology, biosystematics, co-evolution, and any other related fields in biology. In addition to full length papers, the journal also includes short research papers as notes and comments. Invited articles may be accepted or occasion at the request of the Editorial Board. Manuscripts should contain new results of empirical and/or theoretical investigations concerning facts, processes, mechanisms or concepts of evolutionary as well as biological phenomena. Papers that are purely descriptive are not suitable for this journal. Notes & comments of the following contents will not be accepted for publication: Development of DNA markers. The journal is introducing ''Life history monographs of Japanese plant species''. The journal is dedicated to minimizing the time between submission, review and publication and to providing a high quality forum for original research in Plant Species Biology.