Metodologii︠a︡ geobotaniki Sheli︠a︡h-Sosonko, I︠U︡riĭ Romanovych; Krisachenko, V. S. (Valentin Semenovich); Movchan, I︠A︡. I. (I︠A︡roslav Ivanovich)
1991
Book
Oxalis debilis Kunth, an invasive plant native to South America, has already spread extensively throughout various regions in China including West China, East China, Central China, and South China. ...It poses a certain degree of damage to the local ecosystem and demonstrates significant invasive potential. Utilizing distribution information along with environmental variables such as bioclimate, soil factors, elevation, and UV-B radiation, the MaxEnt model combined with ArcGIS was employed to forecast the potential distribution of O. debilis in China. The ROC curve was employed to assess the accuracy of the model, while the jackknife test was utilized to identify dominant environmental variables and determine their optimal values. The simulated AUC value was 0.946 ± 0.004, and the predicted results exhibited a remarkable concordance with the actual outcomes, thereby indicating that the Maxent model demonstrated a high level of confidence in its predictive capabilities. The potential distribution of O. debilis in China spanned 18,914,237 kmsup.2 , accounting for 19.70% of the total land area. This distribution was primarily observed in East, Central, and South China, with Guangdong, Guangxi, and Guizhou being identified as highly suitable habitats for O. debilis. Furthermore, it was observed that the distribution of O. debilis is primarily influenced by environmental variables such as the precipitation of the driest month, the monthly diurnal range, the mean temperature of the wettest quarter, and the isothermality. The findings can serve as a valuable point of reference for the prevention and monitoring of O. debilis spread, thereby contributing to the protection of China’s agricultural, forestry, and ecological environments. It is imperative to acknowledge the hazards associated with O. debilis, closely monitor its invasion, and prevent uncontrolled dissemination.
Restinga formations are defined as the vegetation covering sandy coastal sediments deposited during the Quaternary period, regardless their physiognomy. They are usually characterized as areas of ...confluence between plant species associated with diverse phytogeographical domains. However, detailed floristic and biogeographic studies are still required to better define their distribution patterns, the origins of their plant species, and their biogeographical affinities. In this study, we investigate the floristic similarities among restingas in Northern and Northeastern Brazil and diverse ecosystems from different Brazilian phytogeographical domains (Caatinga, Cerrado, Atlantic Forest and Amazonia). We employed multivariate analyses to investigate differences in species composition and identify floristically similar groups. While sharing species with other ecosystems, restingas exhibit unique floristic composition, representing a coastal flora. Furthermore, the restingas of Northern and Northeastern Brazil are biogeographically subdivided according to previously recognized sectors of the coast of the country. These findings underscore the complex nature of restinga ecosystems, influenced by environmental factors such as geographic distance, geology and climate. These insights contribute to a nuanced understanding of the complex relationships between restingas and their surrounding ecosystems, facilitating informed conservation efforts in the face of escalating urban and industrial expansion along the Brazilian coast.Restinga formations are defined as the vegetation covering sandy coastal sediments deposited during the Quaternary period, regardless their physiognomy. They are usually characterized as areas of confluence between plant species associated with diverse phytogeographical domains. However, detailed floristic and biogeographic studies are still required to better define their distribution patterns, the origins of their plant species, and their biogeographical affinities. In this study, we investigate the floristic similarities among restingas in Northern and Northeastern Brazil and diverse ecosystems from different Brazilian phytogeographical domains (Caatinga, Cerrado, Atlantic Forest and Amazonia). We employed multivariate analyses to investigate differences in species composition and identify floristically similar groups. While sharing species with other ecosystems, restingas exhibit unique floristic composition, representing a coastal flora. Furthermore, the restingas of Northern and Northeastern Brazil are biogeographically subdivided according to previously recognized sectors of the coast of the country. These findings underscore the complex nature of restinga ecosystems, influenced by environmental factors such as geographic distance, geology and climate. These insights contribute to a nuanced understanding of the complex relationships between restingas and their surrounding ecosystems, facilitating informed conservation efforts in the face of escalating urban and industrial expansion along the Brazilian coast.
This work presents an updated list of the species belonging to the genus Phaseolus following its definition of 1978; it is the outcome of the study of eighty-six herbaria and forty-one explorations ...in the field in the period 1978–2019. There are currently eighty-one species, all of them native to the Americas, most of them distributed north of Panama (the genus is a migrant into South America), and half of them being known by very few records. They thrive in warm to mild temperate, seasonally dry, open forest, with rains under favorable temperature, from sea level up to 3,000 m. The recent increase in the number of recognized species is due to the endemic ones; this in combination with few unclassified specimens may indicate that the total number of species is not final yet, and that field work will be rewarding.
Este trabajo presenta una lista actualizada de las especies que pertenecen al género Phaseolus según la definición de 1978. Es el resultado del estudio de ochenta y seis Herbarios y de cuarenta y una bioprospecciones en el campo durante el período 1978–2019. Hay ochenta y una especies hasta la fecha, siendo todas parte de la flora americana, la mayoría distribuida al norte de Panamá (el género es un migrante en Suramérica), y más de la mitad conocida por sólo muy pocas poblaciones. Crecen en climas cálidos a templados moderados, con estación seca y con las lluvias durante el período de temperaturas favorables, en bosques abiertos desde el nivel del mar hasta los 3,000 m. El crecimiento reciente en el número de especies se debe al descubrimiento de especies endémicas. Esta situación combinada con la presencia de algunos especímenes aún por identificar puede indicar que el número total de especies no sea definitivo, y que el trabajo de campo aún puede ser muy gratificante.
Ce travail présente une liste actualisée des espèces appartenant au genre Phaseolus suivant la définition adoptée en 1978. C'est le résultat de l'étude de quatre-vingt-six Herbiers et de quarante et une prospections. Quatre-vingt-une espèces sont actuellement recensées, elles font toutes partie de la flore américaine. La majeure quantité des espèces ont leur distribution au nord du Panama (le genre est un migrant en Amérique du Sud), y plus de la moitié des espèces sont connues seulement par quelques populations. Elles se trouvent dans des climats chauds à modérément tempérés, avec une saison sèche et les pluies distribuées pendant la période de températures favorables. Elles font partie de forêts ouvertes, depuis le niveau de la mer jusqu'à 3,000 m. L'accroissement récent du nombre d'espèces est dû à la découverte d'espèces endémiques. Cette situation combinée à la présence de quelques spécimens encore non identifiés peut indiquer que le nombre total d'espèces n'est pas définitif, et que le travail de terrain peut encore être très positif.
Benchouala A, Bekdouche F, Si Bachir A. 2023. The update and ecological status of the flora of the Belezma National Park, Algeria. Biodiversitas 24: 6134-6150. The establishment of national parks and ...nature-protected areas helps to conserve biodiversity. The conservation and enhancement of the floristic diversity of the Belezma National Park (BNP), Algeria which is also designated as biosphere reserve, require precise knowledge of its flora. To that end, the inventory conducted at BNP at the level of forest massifs, preforests, and mountain grasslands enabled us to identify 562 taxa belonging to 342 genera and 93 families, with a predominance of Asteraceae, Poaceae, and Fabaceae. Based on biological spectrum, hemicryptophytes outnumbers other life forms by 44.4%. Zoochory is the most common distribution mode among inventoried species (44.3%). The Mediterranean type dominates the chronological spectrum with proportion of 45.9%. Endemism is represented by 53 species (9.4% of the total flora). According to executive decree No. 12-03 of January 4, 2012, the BNP flora consists of 196 rare species, including 34 endemic species and 26 threatened and protected ones in Algeria. Based on our results, it has been possible to constitute a database of the BNP flora, useful for its protection.
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