Latest Articles from Neotropical Biology and Conservation Latest 2 Articles from Neotropical Biology and Conservation https://neotropical.pensoft.net/ Fri, 29 Mar 2024 14:16:09 +0200 Pensoft FeedCreator https://neotropical.pensoft.net/i/logo.jpg Latest Articles from Neotropical Biology and Conservation https://neotropical.pensoft.net/ Lessons from a tropical deciduous shrub species: leaf fall can play a more important role than rain in leaf budding https://neotropical.pensoft.net/article/93846/ Neotropical Biology and Conservation 17(4): 239-251

DOI: 10.3897/neotropical.17.e93846

Authors: Nathália Ribeiro Henriques, Cássio Cardoso Pereira

Abstract: In the Cerrado, the sequential chaining of phenological events during the dry season is a pattern observed in many plant species. In this season, many plants completely lose their leaves, and soon after deciduous, there is an expressive production of leaf buds. In this study, we investigated the effect of irrigation and early defoliation on the triggering of leaf budding of the deciduous species Peixotoa tomentosa A.Juss. in the dry season of a seasonal environment with water restrictions. Therefore, we set up an experiment with three groups of plants: control (n = 15), irrigation treatment (n = 15), and removal treatment (n = 15), and after the complete deciduousness of the plants, we carried out phenological monitoring of the development of leaf buds in these plants. From July to August 2022, the leaf budding phenology of the 45 individuals was evaluated twice a week. To test whether there is a difference in the number of leaf buds between treatments, we built generalized linear mixed models (GLMMs). Plants in the removal treatment had a statistically higher number of leaf buds produced than the plants in the irrigation and control groups (P < 0.05). However, the control group and the irrigation treatment did not differ from each other (P > 0.05). We showed that early defoliation influenced the triggering of leaf buds in P. tomentosa, increasing the production of young leaves in their individuals in a seasonal environment with water restrictions. Irrigation was not able to break the dormancy of leaf buds. Our findings contribute to a better understanding of the triggering of vegetative phenophases in deciduous Cerrado plants, showing that leaf fall may play a more important role than rain in the production of leaf buds in the dry season.

HTML

XML

PDF

]]>
Research Article Fri, 11 Nov 2022 18:12:32 +0200
New records and conservation of Passiflora L. (Passifloraceae s.s.) in Rio de Janeiro, Brazil https://neotropical.pensoft.net/article/62045/ Neotropical Biology and Conservation 16(1): 115-128

DOI: 10.3897/neotropical.16.e62045

Authors: Michaele Alvim Milward-de-Azevedo, Natália Brandão Gonçalves Fernandes

Abstract: Passiflora L. belongs to the family Passifloraceae sensu stricto, and comprises 700–750 species. There are approximately 161 known species of the family in Brazil, of which 153 belong to Passiflora, 89 are endemic, 83 occur in the region of the Atlantic Domain; 40 occur in Rio de Janeiro State (RJ). Using field samplings techniques and scientific collection analyses, we present here new geographic records for Passiflora deidamioides Harms, P. imbeana Sacco, P. junqueirae Imig & Cervi, and P. truncata Regel for RJ, principally in the Serra dos Órgãos National Park (PARNASO). Geographic distribution data was used to calculate the Extension of Occurrence (EOO) and Area of Occupancy (AOO) of the species. Passiflora junqueirae, previously considered endemic to Espírito Santo State, now has new records for RJ. Passiflora imbeana and P. truncata are extended into RJ, being recorded there for the first time in the municipality of Teresópolis. The four species are cited for the first time in PARNASO, occurring between 1,000 and 1,700 m.a.s.l. in Montane and Upper Montane Atlantic Rainforest. We provide taxonomic information, distribution maps, and the conservation status of the species.

HTML

XML

PDF

]]>
Short Communication Fri, 29 Jan 2021 10:17:19 +0200