Spatial and temporal patterns at small scale in Austrocedrus chilensis diseased forests and their effect on disease progression
Austrocedrus chilensis is an endemic conifer of Patagonia that suffers a widespread mortality whose causes are a topic of discussion. Since Phytophthora austrocedrae is the most probable cause, we proposed that the spatial and temporal patterns of disease at small scale should reflect pathogen behav...
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2012
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_16124669_v131_n5_p1487_laManna http://hdl.handle.net/20.500.12110/paper_16124669_v131_n5_p1487_laManna |
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paper:paper_16124669_v131_n5_p1487_laManna2023-06-08T16:25:14Z Spatial and temporal patterns at small scale in Austrocedrus chilensis diseased forests and their effect on disease progression Abiotic factors O-ring Phytophthora Soil clay soil coniferous tree disease incidence disease spread endemic species environmental factor forest health forest management management practice mortality soil type spatiotemporal analysis Austrocedrus chilensis Coniferophyta Phytophthora Austrocedrus chilensis is an endemic conifer of Patagonia that suffers a widespread mortality whose causes are a topic of discussion. Since Phytophthora austrocedrae is the most probable cause, we proposed that the spatial and temporal patterns of disease at small scale should reflect pathogen behavior. We aimed at characterizing the spatial and temporal patterns of diseased trees in different soil types and the effect of microsite variability on diseased trees spatial pattern. The spatial pattern of disease was influenced by soil type and tree density. In clay soils with low disease incidence (ca. 25%), the spatial pattern was random and not influenced by abiotic microsite conditions. When disease incidence increased (ca. 70%), concurring with denser plots, the spatial pattern was clustered, as a result of an infection process, and it was independent of microsite variability. In soils with better drainage conditions, that is, alluvial soils with volcanic ash input and coarse textured volcanic soils, the disease was clustered and associated with flat microtopographies. The progression of the disease at small scale was influenced by soil, precipitation and tree density. The spatial and temporal patterns of disease progression were associated with a contagion process and with environmental variables that affect drainage, coinciding with Phytophthora biology and requirements. Our results concur in pointing at Phytophthora as the cause of A. chilensis disease in the study area. Management practices should be urgently applied in order to minimize the spread of the inoculum. © 2012 Springer-Verlag. 2012 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_16124669_v131_n5_p1487_laManna http://hdl.handle.net/20.500.12110/paper_16124669_v131_n5_p1487_laManna |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Abiotic factors O-ring Phytophthora Soil clay soil coniferous tree disease incidence disease spread endemic species environmental factor forest health forest management management practice mortality soil type spatiotemporal analysis Austrocedrus chilensis Coniferophyta Phytophthora |
| spellingShingle |
Abiotic factors O-ring Phytophthora Soil clay soil coniferous tree disease incidence disease spread endemic species environmental factor forest health forest management management practice mortality soil type spatiotemporal analysis Austrocedrus chilensis Coniferophyta Phytophthora Spatial and temporal patterns at small scale in Austrocedrus chilensis diseased forests and their effect on disease progression |
| topic_facet |
Abiotic factors O-ring Phytophthora Soil clay soil coniferous tree disease incidence disease spread endemic species environmental factor forest health forest management management practice mortality soil type spatiotemporal analysis Austrocedrus chilensis Coniferophyta Phytophthora |
| description |
Austrocedrus chilensis is an endemic conifer of Patagonia that suffers a widespread mortality whose causes are a topic of discussion. Since Phytophthora austrocedrae is the most probable cause, we proposed that the spatial and temporal patterns of disease at small scale should reflect pathogen behavior. We aimed at characterizing the spatial and temporal patterns of diseased trees in different soil types and the effect of microsite variability on diseased trees spatial pattern. The spatial pattern of disease was influenced by soil type and tree density. In clay soils with low disease incidence (ca. 25%), the spatial pattern was random and not influenced by abiotic microsite conditions. When disease incidence increased (ca. 70%), concurring with denser plots, the spatial pattern was clustered, as a result of an infection process, and it was independent of microsite variability. In soils with better drainage conditions, that is, alluvial soils with volcanic ash input and coarse textured volcanic soils, the disease was clustered and associated with flat microtopographies. The progression of the disease at small scale was influenced by soil, precipitation and tree density. The spatial and temporal patterns of disease progression were associated with a contagion process and with environmental variables that affect drainage, coinciding with Phytophthora biology and requirements. Our results concur in pointing at Phytophthora as the cause of A. chilensis disease in the study area. Management practices should be urgently applied in order to minimize the spread of the inoculum. © 2012 Springer-Verlag. |
| title |
Spatial and temporal patterns at small scale in Austrocedrus chilensis diseased forests and their effect on disease progression |
| title_short |
Spatial and temporal patterns at small scale in Austrocedrus chilensis diseased forests and their effect on disease progression |
| title_full |
Spatial and temporal patterns at small scale in Austrocedrus chilensis diseased forests and their effect on disease progression |
| title_fullStr |
Spatial and temporal patterns at small scale in Austrocedrus chilensis diseased forests and their effect on disease progression |
| title_full_unstemmed |
Spatial and temporal patterns at small scale in Austrocedrus chilensis diseased forests and their effect on disease progression |
| title_sort |
spatial and temporal patterns at small scale in austrocedrus chilensis diseased forests and their effect on disease progression |
| publishDate |
2012 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_16124669_v131_n5_p1487_laManna http://hdl.handle.net/20.500.12110/paper_16124669_v131_n5_p1487_laManna |
| _version_ |
1768543818854957056 |