Diferentes substratos e ambientes para enraizamento de mini-ixora (Ixora coccinea 'Compacta') Different substrates and environments for mini-ixora (Ixora coccinea 'Compacta') rooting

A mini-ixora (Ixora coccinea 'Compacta') é uma espécie muito apreciada para uso em paisagismo, especialmente em jardins tropicais. A propagação é feita por estaquia, no entanto, a porcentagem de enraizamento é bastante baixa. Sendo assim, objetivou-se com este trabalho avaliar substratos e ambientes para o enraizamento da mini-ixora. Foram utilizadas estacas apicais com comprimento de 10 cm, as quais foram cultivadas em dois tipos de substratos: areia e o produto comercial Plantmax®. Utilizaram-se também três ambientes de enraizamento: câmara úmida, estufa e enraizador tradicional (telado com 50% de sombreamento). O delineamento experimental utilizado foi o de parcelas subdivididas, sendo três ambientes nas parcelas e dois substratos nas subparcelas. Utilizaram-se 5 repetições e 10 estacas por parcela. Analisando-se todos os resultados 100 dias após a implantação do experimento, observou-se que a areia proporcionou maior porcentagem de enraizamento (68%) quando comparada ao Plantmax (48%). A câmara úmida também foi o ambiente que proporcionou melhores condições para a propagação da mini-ixora com maior porcentagem de enraizamento, 98%, em relação a estufa (66%) e ao enraizador tradicional (10%). A areia e a câmara úmida também favoreceram a formação de raízes de melhor qualidade. Concluiu-se que o melhor substrato para propagação da mini-ixora foi areia devendo as estacas serem dispostas em câmara úmida.The mini-ixora (Ixora coccinea 'Compacta') is a species highly appreciated for use in tropical gardens. Its propagation is made by cutting, however, its rooting percentage is very low so, the aim of this work was to evaluate substrates and environments for the mini-ixora rooting. Apical cuttings with 10 cm of length were used in two substrates: sand and Plantmax®. Three rooting environments were used: wet chamber, greenhouse and conventional rooting (shade cloth with 50% of shade). The experiment was carried out by using split plots with three different environments in the main plot and two substrates in the subplots. One also used five replications and ten cuttings per plot. Analyzing the results one hundred days after the experiment implantation one noticed that the sand had proportioned higher percentage of rooting (68%) compared to Plantmax (48%). The wet chamber also was the environment that provided better conditions for the propagation of the mini-ixora, with the highest percentage of rooting, 98%, compared to the greenhouse, 66% and to the conventional rooting, 10%. Moreover, sand and wet chamber also provided a better root quality. One concluded that the best substrate for mini-ixora propagation was sand and the cuttings should be placed in the wet chamber

NEOTROPICAL ALIEN MAMMALS: a data set of occurrence and abundance of alien mammals in the Neotropics

Biological invasion is one of the main threats to native biodiversity. For a species to become invasive, it must be voluntarily or involuntarily introduced by humans into a nonnative habitat. Mammals were among first taxa to be introduced worldwide for game, meat, and labor, yet the number of species introduced in the Neotropics remains unknown. In this data set, we make available occurrence and abundance data on mammal species that (1) transposed a geographical barrier and (2) were voluntarily or involuntarily introduced by humans into the Neotropics. Our data set is composed of 73,738 historical and current georeferenced records on alien mammal species of which around 96% correspond to occurrence data on 77 species belonging to eight orders and 26 families. Data cover 26 continental countries in the Neotropics, ranging from Mexico and its frontier regions (southern Florida and coastal-central Florida in the southeast United States) to Argentina, Paraguay, Chile, and Uruguay, and the 13 countries of Caribbean islands. Our data set also includes neotropical species (e.g., Callithrix sp., Myocastor coypus, Nasua nasua) considered alien in particular areas of Neotropics. The most numerous species in terms of records are from Bos sp. (n = 37,782), Sus scrofa (n = 6,730), and Canis familiaris (n = 10,084); 17 species were represented by only one record (e.g., Syncerus caffer, Cervus timorensis, Cervus unicolor, Canis latrans). Primates have the highest number of species in the data set (n = 20 species), partly because of uncertainties regarding taxonomic identification of the genera Callithrix, which includes the species Callithrix aurita, Callithrix flaviceps, Callithrix geoffroyi, Callithrix jacchus, Callithrix kuhlii, Callithrix penicillata, and their hybrids. This unique data set will be a valuable source of information on invasion risk assessments, biodiversity redistribution and conservation-related research. There are no copyright restrictions. Please cite this data paper when using the data in publications. We also request that researchers and teachers inform us on how they are using the data