Dispersal Characteristics of Two Native and Two Nonnative Fleshy-Fruited Sympatric Shrubs

Castanea ◽  
2014 ◽  
Vol 79 (2) ◽  
pp. 88-99 ◽  
Author(s):  
Laura J. McCall ◽  
Jeffrey L. Walck
Keyword(s):  
Dispersal Characteristics

scholarly journals Investigation on the Dispersal Characteristics of Liquid Breakup in Vacuum

2016 ◽  
Vol 30 (2) ◽  
pp. 410-417 ◽  
Author(s):  
X. X. Lu ◽  
L. Li ◽  
K. H. Luo ◽  
X. B. Ren ◽  
Y. Liu ◽  
...  
Keyword(s):  
Dispersal Characteristics

Dispersal characteristics of Chinese white-bellied ratsNiviventer confucianuspopulations in Thousand Island Lake

2016 ◽  
Vol 36 (5) ◽  
Author(s):  
张新玉 ZHANG Xinyu ◽  
王华 WANG Hua ◽  
鲍毅新 BAO Yixin ◽  
王艳妮 WANG Yanni ◽  
叶彬 YE Bin
Keyword(s):  
Chinese White ◽  
Dispersal Characteristics

The necessity for testing germination of fresh seeds in studies on diaspore heteromorphism as a life-history strategy

2013 ◽  
Vol 23 (2) ◽  
pp. 83-88 ◽  
Author(s):  
Jerry M. Baskin ◽  
Juan J. Lu ◽  
Carol C. Baskin ◽  
Dun Y. Tan
Keyword(s):  
Life History ◽  
High Risk ◽  
Life History Strategy ◽  
The Other ◽  
Dispersal Ability ◽  
Correct Interpretation ◽  
Bet Hedging ◽  
High Dispersal ◽  
Dimorphic Species ◽  
Dispersal Characteristics

AbstractMany studies have compared diaspore dispersal ability and degree of dormancy in the two diaspores of dimorphic plant species. A primary goal of these studies was to determine if germination and dispersal characteristics of the two morphs fit within a high risk–low risk (bet-hedging) life-history strategy, i.e. high dispersal/low dormancy in one morph versus low dispersal/high dormancy in the other one. In a survey of 26 papers on 28 diaspore dimorphic species, we found that in 12 of the studies, which were published between 1978 and 2008, seeds were stored, and thus possibly afterripened, before they were tested for germination. The 14 papers that tested fresh seeds were published between 1963 and 2010. Failure to test fresh seeds likely resulted in misinterpretation of the diaspore dispersal/dormancy strategy in some of the species investigated. We conclude that it is imperative that fresh seeds be tested for germination in order to be certain that the correct relationship between dispersal and dormancy is elucidated, and thus that the correct interpretation is made concerning life-history strategy and bet-hedging, in dimorphic species.

scholarly journals Current Dependent Dispersal Characteristics of Japanese Glass Eel around Taiwan

2022 ◽  
Vol 10 (1) ◽  
pp. 98
Author(s):  
Kuan-Mei Hsiung ◽  
Yen-Ting Lin ◽  
Yu-San Han
Keyword(s):  
Time Series ◽  
Mainland China ◽  
North Equatorial Current ◽  
Coastal Currents ◽  
The North ◽  
Southern Taiwan ◽  
Glass Eels ◽  
Central Taiwan ◽  
The Taiwan Strait ◽  
Dispersal Characteristics

Japanese eel larvae are passively transported to the East Asian Continental Shelf by the North Equatorial Current, Kuroshio and Kuroshio intrusion currents, and coastal currents. Previous studies have investigated the dispersal characteristics and pathways of Japanese glass eels. However, there are still limitations in these studies. According to long-term (2010–2020) catch data from the Fisheries Agency in Taiwan, the distribution and time series of glass eels recruitment to Taiwan are closely related to the surrounding ocean currents. Recruitment begins in eastern Taiwan via the mainstream Kuroshio and in southern Taiwan via the Taiwan Strait Warm Current. In central Taiwan, recruitment occurs from southern Taiwan, as well as from mainland China via the southern branch of the China Coast Current (CCC). The latest recruitment occurred in northern Taiwan and mainly comprised glass eels from mainland China via the northern branch of the CCC. A stronger monsoon during the La Niña phase could affect the recruitment time series in northern and eastern Taiwan. This study suggests that the recruitment directionality of glass eels is an indicator of the flow field of ocean/coastal currents and elucidates the dispersal characteristics of glass eels in the waters around Taiwan.

scholarly journals Influence of seed dimorphism and provenance on seed morphology, dispersal, germination and seedling growth of Brachyscome ciliaris (Asteraceae)

2015 ◽  
Vol 63 (8) ◽  
pp. 705 ◽  
Author(s):  
Rina Aleman ◽  
Manfred Jusaitis ◽  
Joan Gibbs ◽  
Phillip Ainsley ◽  
Fleur Tiver ◽  
...  
Keyword(s):  
Plant Growth ◽  
Seed Size ◽  
Seed Yield ◽  
Seedling Growth ◽  
Seed Morphology ◽  
The Other ◽  
Wind Dispersal ◽  
Germination Speed ◽  
Seed Provenance ◽  
Dispersal Characteristics

Brachyscome ciliaris is a floriferous Australian native daisy, with potential for use as a horticultural species. The species is hardy and seeds are relatively easy to germinate, but it is unique within the Brachyscome genus in that seeds are distinctly dimorphic. Within a fruiting capitulum, ray seeds are smooth and narrow with a minute pappus, whereas disc seeds have broad flat wings with curled hairs and a longer pappus than that of ray seeds. Both seed morphs, collected from five populations of the species, were tested to determine differences in their morphology, germination speed and percentage, seedling growth and wind-dispersal characteristics. Ray seeds were generally lighter and smaller than disc seeds and their length varied significantly with provenance. Dormancy levels of the two seed morphs and growth of ray- and disc-derived seedlings did not differ significantly, but differences were significant among the five populations tested. Seeds germinated readily, and germination was optimal under winter or summer conditions and lower in spring or autumn. Seed production by plants raised from ray or disc seeds was identical, but Noora-sourced plants yielded more seed than did plants sourced from the other provenances tested. Seed size, germination and plant growth of B. ciliaris varied significantly among populations. Winged disc seeds were dispersed slightly further by wind than were wingless ray seeds. We concluded that dormancy, germination and seed-yield characteristics of B. ciliaris were all influenced more by seed provenance than by seed morph (ray or disc).

Phyllocladus aspleniifolius: Variability in the Population Structure, the Regeneration Niche and Dispersion Patterns in Tasmanian Forests

1994 ◽  
Vol 42 (2) ◽  
pp. 163 ◽  
Author(s):  
PCJ Barker ◽  
JB Kirkpatrick
Keyword(s):  
Population Structure ◽  
Large Scale ◽  
Regeneration Niche ◽  
Dispersion Pattern ◽  
Equilibrium Coexistence ◽  
Dispersion Patterns ◽  
Population Structures ◽  
Community Variation ◽  
Regeneration Niches ◽  
Dispersal Characteristics

This study aimed to determine the range of the regeneration niches of Phyllocladus aspleniifolius (Podocarpaceae) in terms of differential microsite occupation, population structure and dispersion pattern at 50 sites. The distribution and sizes of stems were mapped on belt transects to within 0.5 m, and the microsites of seedlings and saplings were recorded. A variety of population structures exist and are related to community floristics and structure. Community variation provides different microsite opportunities. Phyllocladus aspleniifolius showed a preference for elevated sites, including logs, buttresses and old stump mounds. Aggregation of regeneration is common and is determined by microsite distribution and seed dispersal characteristics. It is concluded that although the regeneration of P. aspleniifolius is favoured by catastrophic disturbance, smaller scale processes such as those evoked in the concept of non-equilibrium coexistence are likely to allow P. aspleniifolius to persist in all communities throughout its range in the absence of large scale disturbances.

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