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| Registros recuperados: 35 | |
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| The southern Iberian Peninsula is dominated by a savannah-like ecosystem, the montado, which is a typically Mediterranean cultural adaptation to generally poor productive areas. Montados are exploited for three main uses: forestry, agriculture, and extensive grazing, in proportions that vary according to local conditions (more or less productive land) and historical circumstances. Because these ecosystems occur over a large geographic area (they occupy some 6 million ha), biodiversity would be expected to vary among montados. However, differences in management practices may also influence species distribution. In this paper, we investigate differences in plant and bird species diversity among 60 montados distributed all across southern Portugal. The... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Biodiversity; Birds; Conservation; Ecological concordance; Human versus nature; Montados; Plants. |
| Ano: 2003 |
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| Natale,Evangelina; Reinoso,Herminda. |
| The expansion of invasive plants is considered one of the greatest threats to biodiversity. The environments more threatened by the presence of exotic invasive species are the riparian areas due to their small surface and high diversity. The advance of Tamarix in these environments may be linked to transient conditions of higher water availability, which would allow initial colonization. The objective of the present work was to determine which hydric conditions promote germination and establishment of Tamarix cuttings by measuring in the laboratory the effects of different periods of flooding. It was observed that the germination was high under irrigation at field capacity and was decreased after 10 days of flood, while the establishment through cuttings... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biological invasion; Stress; Salinity; Plants. |
| Ano: 2016 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1667-782X2016000100001 |
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| Saraiva,Claudety B.; Matos,Antonio T.; Matos,Mateus P.; Miranda,Suymara T.. |
| ABSTRACT We aimed to evaluate the efficiency of six different horizontal subsurface flow constructed wetlands (HSSF-CWs), with different substrates (gravel and crushed PET bottles), which also varied in relation to the presence and arrangement of plant species (elephant grass and Tifton 85 bermudagrass) in the removal of pollutants from a bulk milk cooling tank (MTWW). Each bed was fed at a flow rate of 0.18 m3 d-1 and average organic load rate (OLR) of 318 kg ha-1 d-1 of BOD5, with hydraulic detention time (HRT) of 1.84 days in the gravel-filled HSSF-CWs (CWS-G) and 2.97 days in the PET-filled HSSF-CWs (CWs-P). The CWs-P were as efficient as the CWs-G in the removal of BOD5, COD, Total-P, and K-Total, being in some cases even more effective (turbidity,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Wastewater; Elephant grass; Tifton 85 bermudagrass; Plants; Porosity. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000300417 |
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| Tada,Susely F.S.; Souza,Anete P.. |
| The potato (Solanum tuberosum L.) mitochondrial cox3/sdh4/pseudo-cox2 gene cluster has previously been identified by heterologous hybridization using a Marchantia polymorpha sdh4 probe. In our present study we used Southern blotting using sdh4 and cox2 probes to show that the sdh4 and cox2 genes are clustered in the mitochondria of potato, soybean and pea. Northern blotting revealed cotranscription of sdh4 and cox2 in potato but not in cauliflower, indicating that these genes are not clustered in cauliflower. A putative recombination point was detected downstream of the cox2 pseudogene (pseudo-cox2) in potato mitochondrial DNA (mtDNA). This sequence corresponds to a 32 bp sequence which appears to be well-conserved and is adjacent to the terminals of some... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mitochondrial DNA; Rearrangement; Plants; Solanum tuberosum; Cox2. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572006000100017 |
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| Waveren, I.M. van; Iskandar, E.A.P.; Booi, M.; Konijnenburg-van Cittert, J.H.A. van. |
| A preliminary taxonomic revision of the Early Permian Jambi flora results in a lower number of taxa, a number of new determinations and several new combinations (Dicranophyllum molle (Jongmans & Gothan) comb. nov., Oligocarpia posthumii (Jongmans & Gothan) nov. comb., Callipteridium strictinervis (Jongmans & Gothan) comb. nov.). Cones containing the bicuspidate seeds Tobleria bicuspis are recorded for the first time. The exact stratigraphic position of the Jambi flora is unknown, but brachiopods and fusulinids indicate an Early Permian age. Comparisons with the East Asian Permian floras of the Cathaysian realm indicate that the Jambi palaeoflora can best be compared to a relatively xeric Cathaysian flora, possibly indicative of relatively high... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Plants; Permian; Indonesia; Palaeogeography; 38.21. |
| Ano: 2007 |
URL: http://www.repository.naturalis.nl/record/314193 |
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| Registros recuperados: 35 | |
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