Reproductive Effort and Cost of Sexual Reproduction in Female Dicranum polysetum

2002 ◽  
Vol 105 (3) ◽  
pp. 384-397 ◽  
Author(s):  
Irene Bisang ◽  
Johan Ehrlén
Keyword(s):  
Sexual Reproduction ◽  
Reproductive Effort ◽  
Dicranum Polysetum

The cost of reproduction to the clonal herb Asarum canadense (wild ginger)

1995 ◽  
Vol 73 (10) ◽  
pp. 1683-1686 ◽  
Author(s):  
Angela M. Muir
Keyword(s):  
Sexual Reproduction ◽  
Asexual Reproduction ◽  
Energy Cost ◽  
Reproductive Effort ◽  
Cost Of Reproduction ◽  
Net Energy ◽  
Subsequent Growth ◽  
Subsequent Storage ◽  
The Cost ◽  
And Storage

The cost of reproduction to the clonal understorey herb Asarum canadense (wild ginger) was examined by measuring subsequent growth and storage. All connected vegetative rhizome was controlled and fully measured. Three important aspects of reproductive effort were addressed: (i) the effect of sexual reproduction on subsequent storage and growth of fragments, (ii) the effect of asexual reproduction on subsequent storage and growth of fragments, and (iii) a comparison to determine the least costly method of reproduction. It was found that sexual reproduction in wild ginger has an energy cost that diverts energy from storage and growth. Asexual reproduction represents neither a net energy cost nor gain to the fragment and is the least costly mode of reproduction to wild ginger. Key words: Asarum canadense, reproduction, rhizome, clonal.

Multiple stressors result in reduced reproductive effort by Thalassia testudinum in Florida Bay, USA

2020 ◽  
Vol 647 ◽  
pp. 65-78
Author(s):  
MM Peñalver ◽  
MJ Durako ◽  
BT Furman ◽  
MO Hall
Keyword(s):  
Sexual Reproduction ◽  
Large Scale ◽  
Reproductive Effort ◽  
Multiple Stressors ◽  
Florida Bay ◽  
Thalassia Testudinum ◽  
Spatiotemporal Variability ◽  
Heat Accumulation ◽  
Short Shoots ◽  
Hurricane Irma

Sexual reproduction remains an understudied aspect of seagrass ecology. We examined spatiotemporal variability in the percentage of short shoots with sexual reproductive structures and the proportion of sites that had flowered as an indicator of Thalassia testudinum sexual reproductive effort (RE) across Florida Bay, USA. Short shoots were collected annually during spring within 13 basins across the bay from 2006-2019. The sample period followed 2 very active hurricane seasons and included 2 subsequent major disturbance events, a large-scale die-off of seagrasses in 2015, and the passage of Hurricane Irma in 2017. On average, 4.7% of the collected short shoots had flowered between 2006 and 2019, ranging from 1.3-8.5% at the bay scale and 0-30% at the basin level. Regression analyses indicated that RE varied significantly among basins and years, with high multiyear variability in several basins. RE was negatively correlated with annual heat accumulation, and positively correlated with the number of days below 28°C. Annual heat accumulation rose steadily from 2006-2019; accordingly, bay-wide RE declined. RE was higher in western basins, which were the most affected by recent disturbance events, indicating a potentially important role for sexual reproduction in recovery from disturbance. However, significant reductions in RE following the 2015 die-off and Hurricane Irma show limits to the plasticity and resilience of T. testudinum, both in terms of reduced compensatory RE following successive disturbances and reductions in basal RE correlated with rising annual temperatures.

Life cycle of Spirogyra decimina var. juergensii (Kütz.) O.V. Petlovany from Lake Baikal

2018 ◽  
pp. 1-7
Author(s):  
Ekaterina A. Volkova
Keyword(s):  
Life Cycle ◽  
Sexual Reproduction ◽  
Lake Baikal

Identification of Spirogyra species is based on the morphology of the fertile specimens. This work provides characteristics of growth and the time of reproduction of Spirogyra decimina var. juergensii in Lake Baikal and describes sexual reproduction and conditions for germination of new filaments of this species isolated from the lake.

Sexual Reproduction of a Red Tide Dinoflagellate Gymnodinium mikimotoi

1994 ◽  
Vol 60 (1) ◽  
pp. 125-126 ◽  
Author(s):  
Akira Ouchi ◽  
Satoshi Aida ◽  
Takuji Uchida ◽  
Tsuneo Honjo
Keyword(s):  
Sexual Reproduction ◽  
Red Tide

Definitions and concepts of reproductive biology of diatoms (terminological glossary)

2017 ◽  
Vol 51 ◽  
pp. 71-105 ◽  
Author(s):  
N. A. Davidovich
Keyword(s):  
Mating System ◽  
Sexual Reproduction ◽  
Reproductive Biology ◽  
World Literature ◽  
Russian Literature ◽  
Life Cycles ◽  
Transfer Of Knowledge ◽  
Research Experience ◽  
Key Terms

The absence of a conceptual terminology, sufficiently developed and widely accepted in the Russian literature, significantly hinders progress in the field of reproductive biology of diatoms, restricts communication and debate, prevents training and transfer of knowledge. The present work is an attempt, based on world literature and our own research experience, to summarize, systematize, add, and clarify the existing terms, concepts and definitions related to research which are focused on sex and sexual reproduction in diatoms. A glossary of key terms (more than 200, including synonyms) is provided. Terms refer to diatom reproductive biology, life cycles, fertilization, mating system, gender (including inheritance and determination of sex, as well as inheritance associated with sex). Contradictions between possible interpretations of certain terms are briefly discussed.

High Reproductive Effort and Low Recruitment Rates of European Beech: Is There a Limit for the Superior Competitor?

2015 ◽  
Vol 63 (2) ◽  
pp. 198-212 ◽  
Author(s):  
Jerzy Szwagrzyk ◽  
Georg Gratzer ◽  
Hanna Stępniewska ◽  
Janusz Szewczyk ◽  
Bojana Veselinovic
Keyword(s):  
Reproductive Effort ◽  
European Beech ◽  
High Reproductive Effort
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