Are Species Adapted to Their Regeneration Niche, Adult Niche, or Both?

2007 ◽  
Vol 169 (4) ◽  
pp. 433 ◽  
Author(s):  
Poorter
Keyword(s):  
Regeneration Niche

Does oxidative stress determine the thermal limits of the regeneration niche of Vriesea friburgensis and Alcantarea imperialis (Bromeliaceae) seedlings?

2019 ◽  
Vol 80 ◽  
pp. 150-157 ◽  
Author(s):  
Alexandre Aparecido Duarte ◽  
Cristiane Jovelina da-Silva ◽  
Andréa Rodrigues Marques ◽  
Luzia Valentina Modolo ◽  
José Pires Lemos Filho
Keyword(s):  
Oxidative Stress ◽  
Regeneration Niche ◽  
Thermal Limits

scholarly journals Germination requirements of the subordinate fen meadow species Valeriana dioica L

2019 ◽  
Vol 54 (1-2) ◽  
pp. 125-138 ◽  
Author(s):  
Leonid Rasran ◽  
Cornelia Eisenmann ◽  
Regina Wagentristl ◽  
Karl-Georg Bernhardt
Keyword(s):  
Morphological Variability ◽  
Regeneration Niche ◽  
Life Strategy ◽  
Cold Stratification ◽  
Calcareous Fens ◽  
High Germination ◽  
Germination Success ◽  
Pre Treatment ◽  
Early Establishment ◽  
Fen Meadow

AbstractPlant species of the intermediate life strategy type are characteristic for species-rich grasslands, which are sensitive to changes in the level of disturbance. Germination and early establishment of seedlings is expected to be the most crucial stage, limiting the successful colonization of appropriate sites. Valeriana dioica is a typical plant of calcareous fens, which are dependent on regular suppression of strong competitors by means of moderate land use. It is endangered in many parts of Central Europe, including Lower Austria. We studied the effects of light, temperature and pre-treatment (cold stratification) on the germination success of V. dioica seeds and the role of litter produced by different competitors on the early establishment of seedlings. We tested seeds from five populations differing in the level of competition for light and considered also the morphological variability of propagules and maternal plants. We found that V. dioica is able to germinate without light. It showed high germination percentages both under high summer temperatures independent of cold stratification and at low temperatures, but only after the stratification. Litter produced by dicotyledonous forbs was less hampering for the seedlings than that of small sedges or grasses. Valeriana dioica possesses a broad regeneration niche and is able to use gaps for germination and establishment both in spring and in summer. It reproduces successfully in herb-dominated fen meadow vegetation but disappears from reed communities. This study demonstrates the significant plasticity of the regeneration niche for a species with an intermediate life strategy and also stresses the importance of gaps for its reproduction.

Defining the optimal regeneration niche for Pinus pinea L. through physiology-based models for seedling survival and carbon assimilation

Trees ◽  
2015 ◽  
Vol 29 (6) ◽  
pp. 1761-1771 ◽  
Author(s):  
Rafael Calama ◽  
Jaime Puértolas ◽  
Rubén Manso ◽  
Marta Pardos
Keyword(s):  
Seedling Survival ◽  
Carbon Assimilation ◽  
Regeneration Niche ◽  
Pinus Pinea

The community-level effect of light on germination timing in relation to seed mass: a source of regeneration niche differentiation

2014 ◽  
Vol 204 (3) ◽  
pp. 496-506 ◽  
Author(s):  
Chunhui Zhang ◽  
Charles G. Willis ◽  
Liana T. Burghardt ◽  
Wei Qi ◽  
Kun Liu ◽  
...  
Keyword(s):  
Seed Mass ◽  
Niche Differentiation ◽  
Regeneration Niche ◽  
Community Level ◽  
Germination Timing ◽  
Level Effect ◽  
Effect Of Light

Bacca quo vadis: Regeneration niche differences among seven sympatric Vaccinim species on headlands of Newfoundland

2000 ◽  
Vol 10 (1) ◽  
pp. 89-97 ◽  
Author(s):  
Sam P. Vander Kloet ◽  
Nick M. Hill
Keyword(s):  
Single Species ◽  
Regeneration Niche ◽  
Niche Differences ◽  
Germination Success ◽  
Dispersal Unit ◽  
Species Groups ◽  
Regeneration Strategies ◽  
Quo Vadis ◽  
Natural Dispersal ◽  
Insight Into

AbstractOn headlands in Newfoundland, four of the seven sympatric Vaccinium species co-occur frequently at the quadrat level in tundra communities. We hypothesized that differentiation at the regeneration niche level was a prerequisite for the coexistence of these sympatric congeners. After a description and quantification of parameters affecting whole berry and seed dispersal and those affecting seed germination, differentiation at these two levels of the regeneration niches of the seven Vaccinia was investigated using numerical clustering techniques. Differentiation patterns were similar in both the germination and the dispersal dendrograms; three species were most dissimilar (viz. V. angustifolium, V. boreale and V. uliginosum), and the remaining four were separated into single species groups at the 62% and 75% similarity levels by the germination and dispersal dendrograms, respectively. Overall, patterns reflect divergence in dispersal mechanisms and germination abilities among the seven species, in support of the thesis that sympatric congeners have varied regeneration strategies. Differences in the germination success observed after testing natural dispersal units (e.g. seed from scat and seed within whole berries) points to the need to conduct germination trials in ecologically relevant ways. This approach reveals how divergent regeneration strategies are possible in species having similar, palatable baccate fruits (e.g. V. angustifolium and V. uliginosum) and highlights our lack of insight into regeneration strategies of the groups. The cranberry seeds, despite germination success gauged by results from standard germination protocols, exhibit no germination in trials conducted with the natural dispersal unit, the whole berry.

scholarly journals NEOTROPICAL TREE PRODUCTION: INSIGHTS INTO GERMINATION, GROWTH AND OUTPLANTING FOR Maytenus boaria

CERNE ◽  
2017 ◽  
Vol 23 (3) ◽  
pp. 377-385
Author(s):  
Nicolás Marro ◽  
Florencia Soteras ◽  
Noelia Cofré ◽  
Ignacio Ibarra ◽  
Romina Torres ◽  
...  
Keyword(s):  
Mycorrhizal Fungi ◽  
Forest Restoration ◽  
Seedling Survival ◽  
Arbuscular Mycorrhizal ◽  
Regeneration Niche ◽  
Phosphorus Concentration ◽  
Seedling Production ◽  
Neotropical Tree ◽  
Forest Remnants ◽  
Tree Production

ABSTRACT Knowledge about tree production practices is essential to support forest restoration projects, but is still lacking for many tree species. Maytenus boaria is a neotropical tree distributed across the temperate and subtropical South American mountains. In central Argentina, it is mainly restricted to the most preserved forest remnants. Attempts to plant this species have had little success due to difficulties in seedling production and low seedling survival. We set up four trials aiming to identify the constraints of seedling production and outplanting. Under greenhouse conditions, we evaluated (i) pre-germination treatments and (ii) seedling response to inoculation with arbuscular mycorrhizal fungi (AMF). In the field, we planted M. boaria saplings as well as saplings of the most abundant tree in our study site and recorded (iii) survival and height for 10 years. Finally, (iv) we quantified natural recruitment in an attempt to determine M. boaria regeneration niche. Germination varied from 13.1 to 29.2% among treatments. Depulped seeds stratified at 5 ºC showed the highest germination (29.2%). Shoot phosphorus concentration in AMF-treated seedlings was significantly higher (45%) than in non-inoculated seedlings. Survival of M. boaria saplings was similar to that of the most abundant tree in our study site, but their lower height suggested limited growth. We recorded low abundance of M. boaria seedlings in the field; therefore, we were unable to identify the characteristics of its regeneration niche. Reforestation activities should include seed depulping and stratification at 5 ºC to improve germination. The capacity of AMF to enhance nutrition should be evaluated under field conditions.

scholarly journals Regeneration niche of the Canarian juniper: the role of adults, shrubs and environmental conditions

2010 ◽  
Vol 67 (7) ◽  
pp. 709-709 ◽  
Author(s):  
Rüdiger Otto ◽  
Bertil O. Krüsi ◽  
Juan D. Delgado ◽  
José María Fernández-Palacios ◽  
Eduardo García-Del-Rey ◽  
...  
Keyword(s):  
Environmental Conditions ◽  
Regeneration Niche

Are seed germination and ecological breadth associated? Testing the regeneration niche hypothesis with bromeliads in a heterogeneous neotropical montane vegetation

Plant Ecology ◽  
2014 ◽  
Vol 215 (5) ◽  
pp. 517-529 ◽  
Author(s):  
Andréa Rodrigues Marques ◽  
Allbens P. F. Atman ◽  
Fernando A. O. Silveira ◽  
José Pires de Lemos-Filho
Keyword(s):  
Seed Germination ◽  
Regeneration Niche ◽  
Montane Vegetation ◽  
Ecological Breadth
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