Qualidade fisiológica de sementes de algaroba recuperadas de excrementos de muares

Gonçalves, Gerlândio Suassuna; Andrade, Leonaldo Alves de; Gonçalves, Edilma Pereira; Oliveira, Lamartine Soares Bezerra de; Dias, Jobson Targino

doi:10.5433/1679-0359.2013v34n2p593

Cited by 7 publications

(10 citation statements)

References 10 publications

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“…Once on the soil surface, camel faeces may provide moisture necessary for the germination of P. juliflora , as well as nutrients for its seedlings (Ocumpaugh et al ., ). In the field, about 20% of excreted P. juliflora seeds can be preserved for longer than 6 months with viability in the faeces of mules (Gonçalves et al ., ). However, the survival of P. flexuosa seedlings from dung‐germinated seeds did not exceed 1 week, whereas those seeds that did not remain in dung germinated during the rainy season showing higher survivorship (Campos et al ., ).…”

Section: Discussionmentioning

confidence: 97%

“…We addressed three specific questions: (i) ‘What percentage of P. juliflora seeds pass through the camel's gut without physical damage and loss of viability?’; (ii) ‘What is the temporal pattern of seed defecation?’ and (iii) ‘Does ingestion by camels enhance or depress seed germination?’. In view of the spread of P. juliflora along the commercial routes of camels in south‐east Egypt and based on previous data on endozoochory of P. juliflora (Alvarez et al ., ), we hypothesised that ~15% of P. juliflora seeds would survive passing through the camel's gut, at the same time that their germination would be enhanced, as recorded previously after ingestion of Prosopis seeds by other mammal species (Campos & Ojeda, ; Kramp et al ., ; Gonçalves et al ., ; Alvarez et al ., ). To our knowledge, this is the first work studying the potential of the camel as a vector of endozoochory.…”

Section: Introductionmentioning

confidence: 98%

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Can camels disperse seeds of the invasive tree Prosopis juliflora?

2018

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Summary Endozoochory has been recognised as the most important dispersal mechanism in invasive Prosopis species, because their sugary, tasty pods attract animals and because some of their seeds remain intact after passing through some animals' digestive systems. In this study, we evaluated the role of the camel (Camelus dromedarius) as a potential disperser of the seeds of invasive tree Prosopis juliflora. Four camels of similar weight (ca. 400 kg) and age (ca. 2 years) were each fed with 70 fruits (1000 seeds approximately) of P. juliflora, which were retrieved from the camels' dung at 24‐h intervals for 4 days. The seeds retrieved were tested for germination and viability, along with seeds not eaten by the camels, with and without pericarp. Less than 3% of the seeds eaten were retrieved from the camels' dung. Most of the seeds (74%) were retrieved between 24 and 72 h after ingestion. The passage through the camel gut significantly accelerated and increased seed germination of P. juliflora in comparison with uneaten seeds covered with pericarp (48–75% and 15% respectively). While gut passage liberated P. juliflora seeds from the pericarp, increasing and accelerating their germination, the viability of seeds which had not germinated after germination trials were decreased (ca. ~20%) relative to uneaten seeds that had also not germinated. Our results show that, despite the low recorded seed recovery, camels can potentially disperse seeds of P. juliflora, which is in line with field observation showing P. juliflora expansion along the camels' routes in Gebel Elba National Park, south‐east Egypt.

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Section: Discussionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 98%

Can camels disperse seeds of the invasive tree Prosopis juliflora?

2018

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“…Prosopis is native to northern South America (Venezuela and Colombia), Central America and the Caribbean Islands (Burkart, ), but it is currently widespread throughout the tropics (Catalano, Vilardi, Tosto, & Saidman, ; Kaur et al, ). It has been spread globally and has become naturalised and invasive in many places (Rejmánek and Richardson, ), as reported for Brazil (Gonçalves, Alves de Andrade, Gonçalves, Bezerra de Oliveira, & Dias, ), Australia (Robinson, van Klinken, & Metternicht, ) or for India (Tewari et al, ).…”

Section: Introductionmentioning

confidence: 92%

Classification of Prosopis juliflora invasion in the Lake Baringo basin and environmental correlations

et al. 2019

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The spread of Prosopis juliflora in the Baringo basin, Kenya, has led to severe changes in the ecosystem with negative socio‐economic impacts. The drivers that foster the invasiveness of Prosopis are not fully understood. Thus, a method to quantify the degree of infestation will support the determination of environmental preferences and the risk assessment of future Prosopis invasion. We developed a methodology for characterising and classifying degrees of Prosopis infestation in vegetation stands and propose its application in environmental correlation models. The relative cover was identified as the most suited attribute for assessing and monitoring the invasion of Prosopis. The distance of invaded stands from original plantations and environmental attributes related to water availability (ground water table, rainfall and soil water–holding capacity) have potential to predict potential or future invasion risks.

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“…The higher survival rate and life expectancy of P. juliflora seedlings germinated from seeds mixed with cattle manure compared to those mixed with mule manure in the plateau can be attributed to differences in the composition of these animal dungs (Campos et al, 2008;Nascimento et al, 2014). Mule manure has a lower water content and higher fibrous sheath content encasing seeds (Gonçalves et al, 2013). The fibrous sheath covering the seeds probably reduces seed imbibition due to the fact that these animals are not ruminants like cattle (Gonçalves et al, 2013).…”

Section: Source Of Variationmentioning

confidence: 99%

Seed germination and early seedling survival of the invasive speciesProsopis juliflora(Fabaceae) depend on habitat and seed dispersal mode in the Caatinga dry forest

Nascimento

Leal

Tavares³

et al. 2020

PeerJ

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Background Biological invasion is one of the main threats to tropical biodiversity and ecosystem functioning. Prosopis juliflora (Sw) DC. (Fabales: Fabaceae: Caesalpinioideae) was introduced in the Caatinga dry forest of Northeast Brazil at early 1940s and successfully spread across the region. As other invasive species, it may benefit from the soils and seed dispersal by livestock. Here we examine how seed dispersal ecology and soil conditions collectively affect seed germination, early seedling performance and consequently the P. juliflora invasive potential. Methods Seed germination, early seedling survival, life expectancy and soil attributes were examined in 10 plots located across three habitats (flooding plain, alluvial terrace and plateau) into a human-modified landscape of the Caatinga dry forest (a total of 12,000 seeds). Seeds were exposed to four seed dispersal methods: deposition on the soil surface, burial in the soil, passed through cattle (Boss taurus) digestive tracts and mixed with cattle manure and passed through mule (Equus africanus asinus × Equus ferus caballus) digestive tracts and mixed with mule manure. Seeds and seedlings were monitored through a year and their performance examined with expectancy tables. Results Soils differed among habitats, particularly its nutrient availability, texture and water with finely-textured and more fertile soils in the flooding plain. Total seed germination was relatively low (14.5%), with the highest score among seeds buried in the flooding plain (47.4 ± 25.3%). Seed dispersal by cattle and mule also positively impacted seed germination. Early seedling survival rate of P. juliflora was dramatically reduced with few seedlings still alive elapsed a year. Survival rate was highest in the first 30 days and declined between 30 and 60 days with stabilization at 70 days after germination in all seed treatments and habitats. However, survival and life expectancy were higher in the flooding plain at 75 days and lower in the plateau. Prosopis juliflora seedling survival and life expectancy were higher in the case seeds were mixed with cattle manure. Synthesis Prosopis juliflora seeds and seedlings are sensitive to water stress and habitat desiccation. Therefore, they benefit from the humid soils often present across human-disturbed flooding plains. This plant also benefits from seed deposition/dispersal by livestock in these landscapes, since cattle manure represents a nutrient-rich and humid substrate for both seeds and seedlings. The quality of the seed dispersal service varies among livestock species, but this key mutualism between exotic species is due to the arillate, hard-coated and palatable seeds. Prosopis juliflora traits allow this species to take multiple benefits from human presence and thus operating as a human commensal.

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Qualidade fisiológica de sementes de algaroba recuperadas de excrementos de muares

Cited by 7 publications

References 10 publications

Can camels disperse seeds of the invasive tree Prosopis juliflora?

Can camels disperse seeds of the invasive tree Prosopis juliflora?

Classification of Prosopis juliflora invasion in the Lake Baringo basin and environmental correlations

Seed germination and early seedling survival of the invasive speciesProsopis juliflora(Fabaceae) depend on habitat and seed dispersal mode in the Caatinga dry forest

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