scholarly journals The morphometric of lycopsid sporophylls and the evaluation of their dispersal potential: an example from the Upper Devonian of Zhejiang Province, China

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Yi Zhou ◽  
De-Ming Wang ◽  
Le Liu ◽  
Pu Huang
Keyword(s):  
Reproductive Organs ◽  
Dispersal Distance ◽  
Upper Devonian ◽  
Zhejiang Province ◽  
Wind Dispersal ◽  
Turbulent Environment ◽  
Dispersal Potential ◽  
New Form ◽  
Potential Adaptation ◽  
Structural Adaptations

Abstract Background Previous studies have discussed the special structural adaptations of Late Palaeozoic lycopsids, for example, the dispersal potential of reproductive organs. Based on materials from the Upper Devonian Wutong Formation in Changxing County, Zhejiang Province, China, we now analyze the morphometric and perform some calculation to evaluate the dispersal of sporophyll units of lycopsids. Results The fossil sporophyll units are divided into two types in view of obvious difference in shape and we name two new (form) species for them. We also analyze the falling process and give the calculation method of dispersal distance. Conclusions The fossil sporophyll units show relatively poor potential of wind dispersal compared with modern samaras, and show potential adaptation to the turbulent environment.

Long-distance wind dispersal of tree seeds

1995 ◽  
Vol 73 (7) ◽  
pp. 1036-1045 ◽  
Author(s):  
D. F. Greene ◽  
E. A. Johnson
Keyword(s):  
Seed Dispersal ◽  
Conservation Biology ◽  
Plant Conservation ◽  
Dispersal Distance ◽  
Wind Dispersal ◽  
Source Strength ◽  
Long Distance ◽  
Model Predictions ◽  
Tree Seeds ◽  
The Relationship

Long-distance seed dispersal figures prominently in most plant conservation biology arguments, yet we possess little more than anecdotes concerning the relationship among deposition (seeds/m2), source strength (seeds/m2), and distance. In this paper we derive two simple models for long-distance deposition. The models are tested at the scale of 100–1600 m from the source and found to be within 5-fold of the observed deposition. There is no discernable decline in deposition for the range 300–1600 m. While we hesitate to extend model predictions to greater distances, both the models and the empirical results allow us to assert that rare wind-dispersed species in woodlots (dispersal distance around 1 km) are effectively isolated from one another at the temporal scale of 1000 years. Key words: plant conservation biology, wind dispersal of seeds, metapopulations.

VIII.—On a New Long-headed Dipnoan Fish from the Upper Devonian of Scaumenac Bay, P.Q., Canada

1937 ◽  
Vol 59 (1) ◽  
pp. 241-266 ◽  
Author(s):  
W. Graham-Smith ◽  
T. S. Westoll
Keyword(s):  
British Museum ◽  
Upper Devonian ◽  
Museum Collections ◽  
Present Account ◽  
New Form ◽  
Devonian Age ◽  
Early Upper

The well-known deposits of early Upper Devonian age at Scaumenac Bay, P.Q., Canada, have yielded numerous specimens of the rather primitive Dipnoan which is now known as Scaumenacia curta (Whiteaves). During the summer of 1984 one of the authors (W. G.-S.) obtained at this locality three specimens of a very distinct new Dipnoan, characterised by an elongated head and other features. Three other specimens of this new form [No. P. 6785 in the British Museum (Nat. Hist.), the anal fin-skeleton of which was figured by Woodward (1893, p. 241) under the name Scaumenacia curta (Whiteaves), and two in the Royal Scottish Museum] were subsequently recognised in museum collections, but the present account is based entirely on the three specimens mentioned above. From these it has been possible to describe almost the whole skeleton, except the endocranium, and to compare it, in some detail, with those of other primitive Dipnoi; in this comparison we have used the results of work by Porster-Cooper (1937) on Dipterus and by one of the present authors (T. S. W., nearing completion) on certain primitive Dipnoi.

New Sphenophyllum plant from the Upper Devonian of Zhejiang Province, China

2017 ◽  
Vol 30 (7) ◽  
pp. 917-927 ◽  
Author(s):  
Pu Huang ◽  
Lu Liu ◽  
Min Qin ◽  
Le Liu ◽  
Zhenzhen Deng ◽  
...  
Keyword(s):  
Upper Devonian ◽  
Zhejiang Province

Periodicity of reproductive growth in lycopsids: An example from the Upper Devonian of Zhejiang Province, China

Palaeoworld ◽  
2016 ◽  
Vol 25 (1) ◽  
pp. 12-20 ◽  
Author(s):  
Ying-Ying Zhang ◽  
Jin-Zhuang Xue ◽  
Le Liu ◽  
De-Ming Wang
Keyword(s):  
Upper Devonian ◽  
Zhejiang Province ◽  
Reproductive Growth

ASSESSMENT OF WIND DISPERSAL POTENTIAL IN PLANT SPECIES

2003 ◽  
Vol 73 (2) ◽  
pp. 191-205 ◽  
Author(s):  
Oliver Tackenberg ◽  
Peter Poschlod ◽  
Susanne Bonn
Keyword(s):  
Plant Species ◽  
Wind Dispersal ◽  
Dispersal Potential

A new plant with novel leaves from the Upper Devonian of Zhejiang Province, China

Palaeoworld ◽  
2020 ◽  
Vol 29 (4) ◽  
pp. 695-705
Author(s):  
Pu Huang ◽  
Le Liu ◽  
Lu Liu ◽  
Min Qin ◽  
De-Ming Wang ◽  
...  
Keyword(s):  
Upper Devonian ◽  
Zhejiang Province

scholarly journals Relationship between seed morphological traits and wind dispersal trajectory

2019 ◽  
Vol 46 (12) ◽  
pp. 1063 ◽  
Author(s):  
Quanlai Zhou ◽  
Zhimin Liu ◽  
Zhiming Xin ◽  
Stefani Daryanto ◽  
Lixin Wang ◽  
...  
Keyword(s):  
Wind Speed ◽  
Morphological Traits ◽  
Morphological Characteristics ◽  
Large Mass ◽  
Seed Morphology ◽  
Dispersal Distance ◽  
Wind Dispersal ◽  
Wing Loading ◽  
Straight Line ◽  
Release Height

The structure and dynamics of plant populations and communities are largely influenced by seed dispersal. How the wind dispersal trajectory of seeds shifts with differences in seed morphology remains unknown. We used a wind tunnel and video camera to track the dispersal trajectory of seven species of Calligonum whose seeds have different kinds of appendages and other morphological traits, using variable wind speeds and release heights to determine the relationship between seed morphological traits and wind dispersal trajectory. Concave-, straight-line-, horizontal-projectile- and projectile-shaped trajectories were found. Dispersal trajectories such as the horizontal projectile (HP) and projectile (P) tended to have a long dispersal distance. Straight line (SL) and concave curve (CC) trajectories tended to have a short dispersal distance. Seeds with bristles and large mass tended to have SL and CC trajectories, those with wings or balloon and small mass tended to have HP and P trajectories. Wind speed tended to have a stronger influence on the dispersal trajectory of light and low-wing-loading seeds, and release height tended to have a stronger influence on the dispersal trajectory of heavy and high-wing-loading seeds. Thus, seed wind dispersal trajectory is not only determined by seed morphological characteristics but also by environmental factors such as wind speed and release height.

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