Implications from seed traps for reproductive success, allocation and cost in a tall tree species Lindera erythrocarpa

2004 ◽  
Vol 19 (3) ◽  
pp. 185-196 ◽  
Author(s):  
DAISUKE HIRAYAMA ◽  
AKIRA ITOH ◽  
TAKUO YAMAKURA
Keyword(s):  
Reproductive Success ◽  
Tree Species ◽  
Tall Tree

scholarly journals Do tall tree species have higher relative stiffness than shorter species?

2018 ◽  
Vol 105 (10) ◽  
pp. 1617-1630 ◽  
Author(s):  
Richard Jagels ◽  
Maria A. Equiza ◽  
Douglas A. Maguire ◽  
Damian Cirelli
Keyword(s):  
Tree Species ◽  
Relative Stiffness ◽  
Tall Tree

Factors influencing early vegetation establishment following soil scarification in a mixed forest in northern Japan

2005 ◽  
Vol 35 (1) ◽  
pp. 175-188 ◽  
Author(s):  
Toshiya Yoshida ◽  
Yoko Iga ◽  
Megumi Ozawa ◽  
Mahoko Noguchi ◽  
Hideaki Shibata
Keyword(s):  
Species Diversity ◽  
Plant Species ◽  
Tree Species ◽  
Mixed Forest ◽  
Canopy Cover ◽  
Total Density ◽  
Dwarf Bamboo ◽  
Negative Effects ◽  
Tall Tree ◽  
Northern Japan

Scarification is widely conducted in northern Japan to remove understory dwarf bamboo species in degraded forests for replacement with tree species. To explore ways to enhance species diversity and restoration of mixed forest at the treated site, we clarified the mechanisms that lead to compositional heterogeneity of plant species. We evaluated the relative importance of environmental factors (scarification properties, soil properties, light conditions, litter cover, and presence of canopy trees) for the demography of tall tree species (emergence, mortality, and growth) and whole vegetation structure (species diversity and composition) over the two growing seasons immediately following scarification. Of tall tree species, Betula spp. were dominant (60% in total density), followed by Abies sachalinensis (Fr. Schm.) Masters, Acer mono Maxim., and Phellodendron amurense Rupr. Light intensity was an important factor, having mostly negative effects on the demography of these species. Soil factors (e.g., nitrogen content, moisture) affected the demography mainly of shade-intolerant or hygrophilous species. In general, extreme environmental conditions led to the dominance of grasses, forbs, and lianas rather than tall trees. Maintenance of canopy cover, which limits light and supplies seeds as well as litter, proved to be most important in promoting plant species diversification on the scarification site.

Relationships between shoot size and branching patterns in 10 broad-leaved tall tree species in a Japanese cool-temperate forest

2006 ◽  
Vol 84 (12) ◽  
pp. 1894-1907 ◽  
Author(s):  
Takanobu Yagi
Keyword(s):  
Tree Species ◽  
Shoot Length ◽  
Lateral Spread ◽  
Stem Length ◽  
Regression Equations ◽  
Branching Patterns ◽  
Cool Temperate ◽  
Tall Tree ◽  
Architectural Development ◽  
Short Shoots

Within-tree variations in branching patterns (the patterns of daughter shoot production by mother shoots) are the basis of tree architectural plasticity and, therefore, were studied in 10 cool-temperate broad-leaved tall tree species including three species with distinct short shoots. The relationships between mother shoot length versus branching patterns (i.e., the number and size of daughter shoots) were quantified for each species using regression equations. The number and stem length of daughter shoots were greater on longer mother shoots, although the majority of daughter shoots were short on mother shoots of any size. The magnitude of lateral spread of the mother shoot – daughter shoot system relative to that of its main axis extension increased with increasing mother shoot length, indicating weaker apical control on longer mother shoots. Among species, the lower limit of daughter shoot length was shorter and the frequency of short daughter shoots was greater on mother shoots of species with more distinct short shoots. This indicates that species with distinct short shoots effectively avoid branch overcrowding by minimizing daughter shoot extension. Differences in branching patterns among mother shoots of different sizes are discussed in relation to their functional importance for tree architectural development.

Changes of leaf traits and WUE with crown height of four tall tree species

2013 ◽  
Vol 33 (18) ◽  
pp. 5644-5654
Author(s):  
何春霞 HE Chunxia ◽  
李吉跃 LI Jiyue ◽  
孟平 MENG Ping ◽  
张劲松 ZHANG Jinsong
Keyword(s):  
Tree Species ◽  
Leaf Traits ◽  
Crown Height ◽  
Tall Tree

scholarly journals Reproductive success, selected nest characteristics and the effectiveness of establishing protection zones of the lesser spotted eagle (Aquila pomarina) population in Slovakia

2015 ◽  
Vol 9 (1) ◽  
pp. 127-145
Author(s):  
Miroslav Dravecký ◽  
Boris Maderič ◽  
Ján Kicko ◽  
Štefan Danko ◽  
Dušan Karaska ◽  
...  
Keyword(s):  
Reproductive Success ◽  
Tree Species ◽  
Abies Alba ◽  
Alnus Glutinosa ◽  
Breeding Population ◽  
Protection Zone ◽  
Protection Zones ◽  
Aquila Pomarina ◽  
Special Protection Areas ◽  
Breeding Seasons

Abstract In 2011–201 4 monitoring of the lesser spotted eagle (Aquila pomarina) breeding population was conducted in eight special protection areas in Slovakia. From a total of 272 successful breeding attempts by 1 49 breeding pairs during 4 breeding seasons 277 young birds were fledged. The average reproductive success ratio was thus 0.51 juv./pair present, 0.69 juv./breeding pair and 1 .37 juv./1 00 km2. In the surveyed period a total of 1 51 protection zones were established around the nests in 11 9 breeding territories, which provided protection for 1 7% of the breeding population of the lesser spotted eagle in Slovakia. By testing the effectiveness of protection zones it was determined that in nests with an established protection zone the probability of successful raising of young is higher in comparison with nests without such a zone. The probability that breeding will be successful in the nests of breeding pairs without a protection zone was 48.1% (95% confidence intervals (CIs): 37.4–59.0%), and in nests with a protection zone 64.8% (95% CIs: 59.8–69.6%). Among the five most frequent nest tree species used by A. pomarina in Slovakia for breeding are Picea abies 61 × (28.4%), Pinus sylvestris 45× (20.9%), Quercus sp. 36× (1 6.7%), Fagus sylvatica 25× (11 .6%) and Abies alba 1 8× (8.4%). Among the rarer nest tree species used are Larix decidua 1 2× (5.6%) and Alnus glutinosa 3× (1 .4%), while a further 11 species of nest trees did not achieve even 1%. The highest number of nest trees (n = 21 5), i.e. 34 nests (1 5.8%), was found in the altitude range of 401–450 m a.s.l. and 29 nests (1 3.5%) at 351–400 m a.s.l. Other altitude zones were all below the 1 0% mark. A total of 54% of nests found (11 6 nests) are located in the altitude zone of 301–600 m a.s.l., and 71 nests (33%) in the zone 600–900 m a.s.l. The lowest situated nest was at an altitude of 1 50 m and the highest at 950 m; the average was 595.01 m a.s.l. The highest number of nests (n = 209) were located on trees in a range 1 5.1–20.0 m above the ground (n = 92, 44%), while the lowest nest found was at a height of 5 m and the highest at 30 m above the ground.

The effects of plant size and light availability on male and female reproductive success and functional gender in a hermaphrodite tree species, Magnolia stellata

Botany ◽  
2011 ◽  
Vol 89 (9) ◽  
pp. 593-604 ◽  
Author(s):  
Suzuki Setsuko ◽  
Nobuhiro Tomaru
Keyword(s):  
Reproductive Success ◽  
Tree Species ◽  
Local Population ◽  
Light Availability ◽  
Plant Size ◽  
Photon Flux ◽  
Photon Flux Density ◽  
Female Reproductive Success ◽  
Chloroplast Microsatellite ◽  
Male And Female

Plant size and light availability may affect male and (or) female reproductive success and their relative contribution (functional gender). To test this hypothesis, we identified parents of 184 seedlings in a local population within a metapopulation of a hermaphroditic, insect-pollinated tree species, Magnolia stellata (Siebold & Zucc.) Maxim., using 14 nuclear and 3 chloroplast microsatellite markers. Parent pairs of all the seedlings were determined, and both seed and pollen parents could be distinguished for 49.5% of the seedlings. We also measured the parents’ plant size (diameter at breast height of the thickest ramet within each genet; DBHt) and the relative photosynthetic photon flux density (rPPFD) they received. The proportion of seedlings that originated from selfing was 20.7%. The number of seedlings parental trees produced as seed parents (S) was positively affected by DBHt and rPPFD. DBHt (but not rPPFD) also positively affected the number of seedlings sired as pollen parents (P). The femaleness of the parental trees (S/(S + P)) was positively affected by DBHt, probably because DBHt had a stronger effect on the trees’ reproductive success as seed parents than on their success as pollen parents. These results suggest that plant size affects not only reproductive success (male and female), but also functional gender.

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