Summary Impatiens kingdon‐wardii Nob. Tanaka & T. Sugaw. is illustrated, and the history of its discovery is given. IUCN conservation status is reassessed based on the recent further collections from ...Myanmar. A white flower form of I. kingdon‐wardii is described here.
Summary
Furcraea macdougallii Matuda, Falso Maguey Grande, is illustrated (Plate 1053). Its history in cultivation and distribution in Mexico are discussed. Its conservation status: probably extinct ...in the wild.
We report for the first time the occurence of Hyphaene guineensis Schumach. & Thonn. (Arecaceae) in the flora of Benin at Grand-Popo. We describe this species using stem, leaf, and fruit ...morphological traits from field observations, specialized keys, historical and modern herbarium vouchers. Demographic and phenological observations are also provided, and a key is proposed for differentiating H. guineensis from the other species of Hyphaene known from Benin. This work contributes to the knowledge of the geographical distribution, the ecology, and the conservation of H. guineensis in tropical Africa.
The characterization of the elements of geodiversity, through different inventory and quantitative evaluation methods, in the past decades, has allowed the identification of the most representative ...sites of the regional geological evolution of the state of São Paulo. Between 2013 and 2016, the first phase of the inventory of the geological heritage of São Paulo state was carried out. At the end of this stage, 142 geosites integrated into 11 geological categories were defined, which were characterized and quantitatively evaluated according to their scientific value and degradation risk, to establish future management priorities. Between 2017 and 2019, in the second phase of the research, the data obtained in the inventory were submitted to an analysis aiming at the diagnosis of use and protection and the proposal of strategies for management and public use of these geosites. Currently, the inventory of the geological heritage of the state is composed of 143 geosites, of which, based on their scientific value, 57 were evaluated as potential candidates to be integrated into the inventory of the national geological heritage. Despite this, there are still few works that systematically apply the stages of conservation and monitoring of geological sites. In this context, this study presented the initial phase of the definition of a methodology for the assessment of the evolution of the state of conservation of the geological heritage and its application in the state of São Paulo, to subsidize future actions of management and preservation of this heritage. In this stage, 129 state geosites were evaluated based on three defined criteria. This evaluation preliminarily resulted in the identification of 10 priority geosites, which will
We report the first record of Vitex orinocensis Kunth (Lamiaceae) from Ceará state, northeastern Brazil. This species was collected in an upland Semideciduous Seasonal Forest. This occurrence ...adds new information about the flora of Ceará and expands the geographic range of this species in Brazil, which is important for its conservation. We provide taxonomic information, distribution map, implications for its conservation status, photographs, and a identification key for the Vitex Tour. ex L. species from Ceará.
For this article, I reviewed empirical studies finding significant ecological responses to habitat fragmentation per se-in other words, significant responses to fragmentation independent of the ...effects of habitat amount (hereafter referred to as habitat fragmentation). I asked these two questions: Are most significant responses to habitat fragmentation negative or positive? And do particular attributes of species or landscapes lead to a predominance of negative or positive significant responses? I found 118 studies reporting 381 significant responses to habitat fragmentation independent of habitat amount
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Of these responses, 76% were positive. Most significant fragmentation effects were positive, irrespective of how the authors controlled for habitat amount, the measure of fragmentation, the taxonomic group, the type of response variable, or the degree of specialization or conservation status of the species or species group. No support was found for predictions that most significant responses to fragmentation should be negative in the tropics, for species with larger movement ranges, or when habitat amount is low; most significant fragmentation effects were positive in all of these cases. Thus, although 24% of significant responses to habitat fragmentation were negative, I found no conditions in which most responses were negative. Authors suggest a wide range of possible explanations for significant positive responses to habitat fragmentation: increased functional connectivity, habitat diversity, positive edge effects, stability of predator-prey host-parasitoid systems, reduced competition, spreading of risk, and landscape complementation. A consistent preponderance of positive significant responses to fragmentation implies that there is no justification for assigning lower conservation value to a small patch than to an equivalent area within a large patch-instead, it implies just the opposite. This finding also suggests that land sharing will usually provide higher ecological value than land sparing.
Se describe e ilustra una nueva especie del género Pleurothallis para la región Andina colombiana llamada P. villahermosae, perteneciente a la subsección Macrophyllae-Fasciculatae. La nueva especie ...es morfológicamente similar a Pleurothalis callosa, de la cual se diferencia por tener el sépalo dorsal y el sinsépalo ovado-elíptico; pétalos falcado-lanceolados, acuminados y el labelo cuadrangular-ovado con presencia de 2 callos basales que ocupan un tercio de la longitud del labelo (vs. sépalo dorsal elíptico y sinsépalo ampliamente ovado y labelo unguiculado con 2 callos basales que se extienden hasta la mitad de la longitud del labelo en P. callosa). Se proporciona información geográfica, características ecológicas y estado de conservación de la nueva especie.
Chiococca insularis (Ridley) C.M.Taylor & M.R.V.Barbosa (Rubiaceae) was described by Henry Nicholas Ridley in 1890, based on a collection he made on the island of Fernando de Noronha (Pernambuco, ...Brazil) in 1887. Since then, this species had not been collected again and has been treated as probably extinct. After 130 years, we discovered two new populations in the southwestern portion of the island, and the conservation status of the species is reassessed. A full description of the species, with previously unseen or unmeasured characters, habitat information and photographs of the plant and environment are provided.
Summary Xyloolaena perrieri F. Gérard belongs to the Sarcolaenaceae, the largest Madagascar endemic plant family. It is illustrated here, and its habitat and conservation status are discussed. As ...explained below, the spelling of the generic name Xylolaena is sometimes preferred over the commonly used Xyloolaena.
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