Seed dispersal capacity of sheep and goats in a near-coastal dry grassland habitat

2016 ◽  
Vol 17 (6) ◽  
pp. 508-515 ◽  
Author(s):  
O. Benthien ◽  
J. Bober ◽  
J. Castens ◽  
C. Stolter
Keyword(s):  
Seed Dispersal ◽  
Dispersal Capacity ◽  
Dry Grassland ◽  
Sheep And Goats

scholarly journals Potential for endozoochorous seed dispersal by sheep and goats: Risk of weed seed transport via animal faeces

Weed Research ◽  
2020 ◽  
Author(s):  
Mostafa Oveisi ◽  
Ahmad Ojaghi ◽  
Hamid Rahimian Mashhadi ◽  
Heinz Müller‐Schärer ◽  
Kamran Reza Yazdi ◽  
...  
Keyword(s):  
Seed Dispersal ◽  
Weed Seed ◽  
Sheep And Goats

scholarly journals Bird‐mediated seed dispersal: reduced digestive efficiency in active birds modulates the dispersal capacity of plant seeds

Oikos ◽  
2014 ◽  
Vol 124 (7) ◽  
pp. 899-907 ◽  
Author(s):  
Erik Kleyheeg ◽  
Casper H. A. van Leeuwen ◽  
Mary A. Morison ◽  
Bart A. Nolet ◽  
Merel B. Soons
Keyword(s):  
Seed Dispersal ◽  
Digestive Efficiency ◽  
Dispersal Capacity ◽  
Plant Seeds

Seed dispersal capacity of Salix caprea L. assessed by seed trapping and parentage analysis

2019 ◽  
Vol 138 (3) ◽  
pp. 495-511 ◽  
Author(s):  
Katharina Tiebel ◽  
Ludger Leinemann ◽  
Bernhard Hosius ◽  
Robert Schlicht ◽  
Nico Frischbier ◽  
...  
Keyword(s):  
Seed Dispersal ◽  
Parentage Analysis ◽  
Dispersal Capacity ◽  
Salix Caprea

Seed dispersal capacity and post-dispersal fate of the invasive Spartina alterniflora in saltmarshes of the Yangtze Estuary

2016 ◽  
Vol 169 ◽  
pp. 158-163 ◽  
Author(s):  
Derong Xiao ◽  
Chao Zhang ◽  
Liquan Zhang ◽  
Zhenchang Zhu ◽  
Kun Tian ◽  
...  
Keyword(s):  
Seed Dispersal ◽  
Spartina Alterniflora ◽  
Yangtze Estuary ◽  
The Yangtze Estuary ◽  
Dispersal Capacity

scholarly journals Activity time budget patterns of sheep and goats co-grazing on semi-natural species-rich dry grassland

2013 ◽  
Vol 58 (No. 5) ◽  
pp. 208-216 ◽  
Author(s):  
P. Pokorná ◽  
P. Hejcmanová ◽  
M. Hejcman ◽  
V. Pavlů
Keyword(s):  
Social Interactions ◽  
Time Budget ◽  
Middle Part ◽  
Positive Trend ◽  
Time Budgets ◽  
Activity Time ◽  
Dry Grassland ◽  
Sheep And Goats ◽  
Grassland Community ◽  
Perennial Plant

Activity time budget patterns and grazing response to sward and environmental conditions were investigated for paddocks of sheep and goats co-grazing for conservation purposes on a semi-natural species-rich dry grassland community endangered by shrub and tall perennial plant encroachment in a protected nature reserve in South Moravia (Czech Republic). Grazing was conducted by a rotational stocking system for 14 weeks in late grazing season in 2008 with 60 dry ewes and 20 goats. Twelve ewes and four goats were observed; grazing, ruminating, idling and other activities (salt licking, social interactions, walking), along with topographical position in the paddock were recorded at 5-minute intervals within 14 hours of daylight. Sheep and goats did not differ in their principal activity time budgets, such as the average total daylight time spent grazing (sheep: 8.57 h, goats: 8.59 h), ruminating (sheep: 1.42 h, goats: 1.44 h), or idling (sheep: 3.23 h, goats: 3.18 h), the duration of bouts of each activity, or the number of bouts of grazing and ruminating. There was no pattern in activity time budgets indicating dynamics in progressing season, nor was there a response to daily average temperature or to paddock size. Sheep and goats showed similar responses to groundcover of particular plant functional types. The animals showed a positive trend in response of total daylight grazing time to grass available biomass and a negative response of total daylight grazing time to herbaceous biomass for both sheep and goats. The total daylight grazing time was independent of availability of woody plants. Goats devoted more time (1.51 h) to other activities than sheep (1.34 h), especially to social interactions and salt licking. On the other hand, sheep spent proportionally more time walking. Both sheep and goats showed similar patterns in spatial use of paddocks on hill slopes, spending the most time in the middle part and the least time in the lower part of paddocks. 

scholarly journals Endozoochory and Germination of Selected Ingested Seeds by Malayan Box Turtles (Cuoraamboinensis) from Laguna Province, Philippines

2021 ◽  
pp. 19-27
Author(s):  
Kliff Eldry G. Ibañez ◽  
Larry V. Padilla
Keyword(s):  
Seed Germination ◽  
Seed Dispersal ◽  
Germination Rate ◽  
Dispersal Capacity ◽  
Plant Seed ◽  
Gut Passage ◽  
Significant Difference ◽  
Box Turtles ◽  
Percent Germination ◽  
Pass Through

Aims: Malayan box turtles’ (Cuoraamboinensis) ecological niche are essential in an ecosystem but are often overlooked. This study investigated the germination of selected seeds that passed through the gut of Malayan box turtles to determine its role in promoting seed dispersal and aiding seed germination. Study Design:Experimental approach. Place and Duration of Study:Pamantasan ng Lungsod ng Maynila (University of the City of Manila) and Dasmarinas, Cavite between June 2016 to March 2017. Methodology: The seeds that passed through the turtle’s gut (Gut Passed Seeds) and seeds that did not pass through its gut (Mechanically Extracted Seeds) underwent comparative germination test. The Germination Rate (GR) and Percent Germination (%GR) of each group were determined in the study.Seed shadowing was also conducted to evaluate the turtle’s seed dispersal capacity (endozoochory). Results: Results showed that after gut passage, seed GR and %GR were enhanced on Lycopersiconesculentum, Carica papaya, Psidiumguajava, and Muntingiacalabura. However, Germination Rate and Percent Germination of Passifloraquadrangularis decreased after gut passage. Statistical analyses revealed that there is a significant difference in the GR and %G of M. calabura and %G of L. esculentum, and P. quadrangularis. Thread trailing method showed that C. amboinensis can disperse seeds at a distance of 24.8 to 52.8 meters. Conclusion: This study demonstrates the important role of C. amboinensis in the ecosystem through its contribution to plant seed germination and dispersal.It showed that Malayan box turtles are not only seed dispersal agents but are also important in the germination of seeds that they have ingested and defecated.

scholarly journals Pollen and seed dispersal of Brazil nut trees in the southwestern Brazilian Amazon

2018 ◽  
Vol 48 (3) ◽  
pp. 217-223
Author(s):  
Karina MARTINS ◽  
Raifanny da Silva Oliveira dos SANTOS ◽  
Tatiana de CAMPOS ◽  
Lúcia Helena de Oliveira WADT
Keyword(s):  
Genetic Diversity ◽  
Seed Dispersal ◽  
Pollen Dispersal ◽  
Brazilian Amazon ◽  
Parentage Analysis ◽  
Fixation Index ◽  
Gene Dispersal ◽  
Dispersal Capacity ◽  
Pollen And Seed Dispersal ◽  
Natural Stands

ABSTRACT Pollen and seed dispersal patterns greatly influence the spatial distribution of plant genetic diversity. Microsatellite-based parentage analysis provides accurate estimates of contemporary gene dispersal. Although most tropical trees have been shown to exhibit widespread pollen dispersal, few studies have estimated contemporary gene dispersal after seedling establishment. Bertholletia excelsa (Lecythidaceae) is pollinated by large-bodied bees, while previous seed-tracking experiments suggest their seeds are mainly dispersed across very short distances by scatter-hoarding rodents, who primarily act as seed predators. Here we used parentage analysis to provide contemporary estimates of pollen and seed dispersal in B. excelsa recruits. We examined six 25-ha plots located in two natural stands in the Acre River valley, in the southwestern Brazilian Amazon. We used 11 microsatellite markers to estimate genetic diversity and fixation index parameters in adults, seedlings and saplings. Genetic diversity was moderate and did not differ across size classes or sampling locations. We assigned pollen and seed parents for < 20% of the recruits, indicating that most events of realized gene flow occurred beyond our 25-ha plots. Only 10 parentage assignments were confirmed with 80% confidence. Pollen distance ranged from 33 to 372 m and seed dispersal from 58 to 655 m. Actual seed-dispersal distances were far greater than the estimates obtained in previous seed-tracking experiments. Thus, studies encompassing larger sampling areas are necessary to determine a more representative spatial scale of B. excelsa’s pollen and seed dispersal capacity in natural stands.

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