T. E. Erickson, J. Dwyer, Emma L. Dalziell, J. James, M. Muñoz‐Rojas, D. Merritt
{"title":"Unpacking the recruitment potential of seeds in reconstructed soils and varying rainfall patterns","authors":"T. E. Erickson, J. Dwyer, Emma L. Dalziell, J. James, M. Muñoz‐Rojas, D. Merritt","doi":"10.1071/bt22141","DOIUrl":"https://doi.org/10.1071/bt22141","url":null,"abstract":"","PeriodicalId":8607,"journal":{"name":"Australian Journal of Botany","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"58549411","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
K. Sommerville, Z. Newby, Amelia J. Martyn Yenson, C. Offord
{"title":"Are orthodox Australian rainforest seeds short-lived in storage?","authors":"K. Sommerville, Z. Newby, Amelia J. Martyn Yenson, C. Offord","doi":"10.1071/bt22104","DOIUrl":"https://doi.org/10.1071/bt22104","url":null,"abstract":"","PeriodicalId":8607,"journal":{"name":"Australian Journal of Botany","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"58549211","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. M. van der Merwe, Jason G. Bragg, Richard Dimon, Patrick S. Fahey, P. Hogbin, Patricia Lu-Irving, A. Mertin, M. Rossetto, Trevor C. Wilson, J. Yap
{"title":"Maintaining separate maternal lines increases the value and applications of seed collections","authors":"M. M. van der Merwe, Jason G. Bragg, Richard Dimon, Patrick S. Fahey, P. Hogbin, Patricia Lu-Irving, A. Mertin, M. Rossetto, Trevor C. Wilson, J. Yap","doi":"10.1071/bt22136","DOIUrl":"https://doi.org/10.1071/bt22136","url":null,"abstract":"","PeriodicalId":8607,"journal":{"name":"Australian Journal of Botany","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"58549157","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
R. Dillon, D. Coates, R. Standish, L. Monks, M. Waycott
{"title":"Assessing plant translocation success: common metrics mask high levels of inbreeding in a recently established Banksia brownii (Proteaceae) population","authors":"R. Dillon, D. Coates, R. Standish, L. Monks, M. Waycott","doi":"10.1071/bt22071","DOIUrl":"https://doi.org/10.1071/bt22071","url":null,"abstract":"","PeriodicalId":8607,"journal":{"name":"Australian Journal of Botany","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"58548325","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Environmental variation in an increasing incidence of dead trees in lowland to subalpine eucalypt forests and woodlands 2011–2021","authors":"Zimeng Liu, J. Kirkpatrick","doi":"10.1071/bt22119","DOIUrl":"https://doi.org/10.1071/bt22119","url":null,"abstract":"","PeriodicalId":8607,"journal":{"name":"Australian Journal of Botany","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"58548912","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Brodie Verrall, Patrick Norman, B. Mackey, Scout Fisher, Jack Dodd
{"title":"The impact of climate change and wildfire on decadal alpine vegetation dynamics","authors":"Brodie Verrall, Patrick Norman, B. Mackey, Scout Fisher, Jack Dodd","doi":"10.1071/bt23002","DOIUrl":"https://doi.org/10.1071/bt23002","url":null,"abstract":"","PeriodicalId":8607,"journal":{"name":"Australian Journal of Botany","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"58549500","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
S. Heyes, J. Morgan, S. Sinclair, Z. Walker, S. Hoebee
{"title":"Pre-dispersal seed-predation affects fruit crop and seed fitness in a highly fragmented savanna tree","authors":"S. Heyes, J. Morgan, S. Sinclair, Z. Walker, S. Hoebee","doi":"10.1071/bt23011","DOIUrl":"https://doi.org/10.1071/bt23011","url":null,"abstract":"","PeriodicalId":8607,"journal":{"name":"Australian Journal of Botany","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"58549619","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Laura C. Lopresti, K. Sommerville, Amy‐Marie Gilpin, T. E. Minchinton
Context . Understanding the factors that in fl uence viable-seed production is crucial in the conservation of threatened plant species, yet these factors are often poorly understood. Aims . We investigated the reproductive biology of Zieria granulata C.Moore ex Benth., an endangered Australian endemic with a limited distribution, with the intent of improving conservation and restoration outcomes. Methods . Components of fl oral biology, including fl oral ontogeny and nectar production, were quanti fi ed to determine the pollination syndrome and the likely breeding system. Flower-visitor surveys (using both digital video recordings and human observations), a manipulative wind-pollination experiment and hand-pollination experiments were conducted to investigate pollination vectors and con fi rm the breeding system. Key results . Z. granulata fl owers were small, white, protandrous and produced highly ornamented pollen grains and small quantities of nectar; these characteristics suggest that the species fi ts the general entomophily syndrome. All fl oral visitors were arthropod species and of the 72 visitors observed, predominantly from the Dipteran and Hymenopteran families, 18 could be regarded as potential pollinators. Failure of simulated wind gusts (40 km h − 1 ) to transport pollen ≥ 5 cm indicated that anemophily is unlikely for this species. Autonomous and manipulative sel fi ng did not result in viable seed set, indicating that this is an obligate outcrossing species. However, fruit and viable-seed production was highly variable within and among some other treatments. Pre-dispersal seed predation was recorded at all study sites. Conclusions . Pre-dispersal seed predation was recorded at all study sites and is a likely factor inhibiting viable-seed production. Implications . This knowledge will be used to improve seed yield for collections used for ex situ conservation and restoration programs for the endangered Z. granulata .
{"title":"Floral biology, pollination vectors and breeding system of Zieria granulata (Rutaceae), an endangered shrub endemic to eastern Australia","authors":"Laura C. Lopresti, K. Sommerville, Amy‐Marie Gilpin, T. E. Minchinton","doi":"10.1071/bt22055","DOIUrl":"https://doi.org/10.1071/bt22055","url":null,"abstract":"Context . Understanding the factors that in fl uence viable-seed production is crucial in the conservation of threatened plant species, yet these factors are often poorly understood. Aims . We investigated the reproductive biology of Zieria granulata C.Moore ex Benth., an endangered Australian endemic with a limited distribution, with the intent of improving conservation and restoration outcomes. Methods . Components of fl oral biology, including fl oral ontogeny and nectar production, were quanti fi ed to determine the pollination syndrome and the likely breeding system. Flower-visitor surveys (using both digital video recordings and human observations), a manipulative wind-pollination experiment and hand-pollination experiments were conducted to investigate pollination vectors and con fi rm the breeding system. Key results . Z. granulata fl owers were small, white, protandrous and produced highly ornamented pollen grains and small quantities of nectar; these characteristics suggest that the species fi ts the general entomophily syndrome. All fl oral visitors were arthropod species and of the 72 visitors observed, predominantly from the Dipteran and Hymenopteran families, 18 could be regarded as potential pollinators. Failure of simulated wind gusts (40 km h − 1 ) to transport pollen ≥ 5 cm indicated that anemophily is unlikely for this species. Autonomous and manipulative sel fi ng did not result in viable seed set, indicating that this is an obligate outcrossing species. However, fruit and viable-seed production was highly variable within and among some other treatments. Pre-dispersal seed predation was recorded at all study sites. Conclusions . Pre-dispersal seed predation was recorded at all study sites and is a likely factor inhibiting viable-seed production. Implications . This knowledge will be used to improve seed yield for collections used for ex situ conservation and restoration programs for the endangered Z. granulata .","PeriodicalId":8607,"journal":{"name":"Australian Journal of Botany","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"58547493","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
E. Calazans, A. Lopes, L. Girotto, A. de Paula, A. C. Franco, C. S. Ferreira
{"title":"Mechanical control inadvertently increases risk of alien plant invasion: influence of stem fragmentation and inundation regimes on Arundo donax regeneration in Neotropical savanna","authors":"E. Calazans, A. Lopes, L. Girotto, A. de Paula, A. C. Franco, C. S. Ferreira","doi":"10.1071/bt22139","DOIUrl":"https://doi.org/10.1071/bt22139","url":null,"abstract":"","PeriodicalId":8607,"journal":{"name":"Australian Journal of Botany","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"58549344","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
George Matusick, Katinka X. Ruthrof, Peter Scott, Giles E. St. J. Hardy
Context Forest ecosystems experience compositional and structural changes as species’ environmental envelopes shift with climate change. Extreme climate events and pests/pathogens are driving these ecosystem changes. Determining which of the two potential drivers is causing a particular forest die-off can be challenging. In south-western Australia, widespread forest die-off in 2011 coincided with extremely hot and dry conditions. It occurred in a forest ecosystem that has historically experienced Phytophthora cinnamomi root disease (Phytophthora dieback).Aims To determine whether the causal agent of Phytophthora dieback, P. cinnamomi, was associated with forest die-off in the Northern Jarrah Forest.Methods A combination of direct (isolation of pathogen) and indirect (survey of susceptible indicator plant species) measurements were taken inside and outside patches of forest experiencing the die-off.Key results There was no consistent association between die-off patches and the presence of P. cinnamomi. P. cinnamomi was isolated from 3 of 33 control plots and 3 of 33 die-off plots. Although several plant species susceptible to P. cinnamomi were absent from die-off plots, the findings were inconsistent across species. This may be explained by plant tolerance to high temperatures and drought.Conclusions P. cinnamomi was not the proximate cause of the observed die-off in the Northern Jarrah Forest in 2011.Implications Novel disturbance caused by extreme climate events can mimic damage caused by certain pests/pathogens. More research is needed to determine the tolerances of plants to extreme temperature and drought conditions to disentangle abiotic and biotic drivers of tree die-off.
{"title":"Climate change or tree disease: challenges for diagnosing causes of forest die-off","authors":"George Matusick, Katinka X. Ruthrof, Peter Scott, Giles E. St. J. Hardy","doi":"10.1071/bt23039","DOIUrl":"https://doi.org/10.1071/bt23039","url":null,"abstract":"Context Forest ecosystems experience compositional and structural changes as species’ environmental envelopes shift with climate change. Extreme climate events and pests/pathogens are driving these ecosystem changes. Determining which of the two potential drivers is causing a particular forest die-off can be challenging. In south-western Australia, widespread forest die-off in 2011 coincided with extremely hot and dry conditions. It occurred in a forest ecosystem that has historically experienced Phytophthora cinnamomi root disease (Phytophthora dieback).Aims To determine whether the causal agent of Phytophthora dieback, P. cinnamomi, was associated with forest die-off in the Northern Jarrah Forest.Methods A combination of direct (isolation of pathogen) and indirect (survey of susceptible indicator plant species) measurements were taken inside and outside patches of forest experiencing the die-off.Key results There was no consistent association between die-off patches and the presence of P. cinnamomi. P. cinnamomi was isolated from 3 of 33 control plots and 3 of 33 die-off plots. Although several plant species susceptible to P. cinnamomi were absent from die-off plots, the findings were inconsistent across species. This may be explained by plant tolerance to high temperatures and drought.Conclusions P. cinnamomi was not the proximate cause of the observed die-off in the Northern Jarrah Forest in 2011.Implications Novel disturbance caused by extreme climate events can mimic damage caused by certain pests/pathogens. More research is needed to determine the tolerances of plants to extreme temperature and drought conditions to disentangle abiotic and biotic drivers of tree die-off.","PeriodicalId":8607,"journal":{"name":"Australian Journal of Botany","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135447789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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