Photographs on tree-rodent interactions
Kanumazawa Riparian Forest, northern Japan
Update: December 25, 2003
A. Forest and trees (11 photos)
B. Seeds and seed dispersal (5 photos)
C. Seedlings (7 photos)
D. Rodents (7 photos)
E. Rodents and beech mast in Nukumi-daira (6 photos; different, tentative page)
A. Forest and trees.
A1) overview of Kanumazawa Riparian Forest, Iwate prefecture
A2) Kanumazawa Riparian Research Forest
A3) Kanumazawa Forest in early spring
A4) Flowering population of Aesculus turbinata in early June
A5) same A. turbinata population
A6) a big A. turbianta tree with K. Hoshizaki
A7) Cercidiphyllum japonicum : a huge, wind-dispersed tree with many stools
and with K. Hoshizaki and a student
A8) C. japonicum with colleagus
A9) C. japonicum huge individual tree with many stools and with K. Hoshizaki
A10) Acer mono (yellowed leaves) and Cecidiphyllum japonicum (a big tree)
A11) The core-research plot (1 ha), with regularly spaced seed-traps
to monitor seedfall densities of major tree species.
B. Seeds and seed dispersal.
B1) variation in seed size :
Aesculus turbinata (bottom left), Fagus crenata and Quercus crispula (right)
B2) a large A. turbinata fruit (seed(s) and husks)
B3) Tracking movement of Aesculus seeds using wire-thread (Hoshizaki and Hulme, 2002)
B4) an Aesculus seed gnawn by rodents
B5) Detection of a seedling's parent using seed-mark with ink (Hoshizaki et al., 1999)
C1) Aesculus turbinata seedlings from a cache (Hoshizaki et al., 1997)
C2) A. turbinata seedlings originated from larderhoarded seeds
C3) Cotyledonal reserves in A. turbinata seedlings,
3- and 5-wk after the emergence (Hoshizaki et al., 1997)
C4) A. turbianta seedlings whose shoot clipped
C5) Resprouting A. turbinata seedling after rodent's clipping
C6) Callus being produced after shoot clipping
C7) a resprouted A. turbinata seedling, established from callus
D1) Apodemus speciosus : the main seed-disperser/predator of Aesculus turbintata
D2) Eothenomys andersoni juvenile eating Aesculus seedlinlgs
D3) A. speciosus attracted to a pile of Aesculus seeds
D4) A. speciosus transporting an Aesculus seed
D5) A. speciosus excavating hypogeal cotyledon
D6) A. speciosus yielding hypogeal cotyledons
D7) A. argenteus : a species with least body weight in temperate forests in Japan.
(This species do not interact with Aesclus turbinata.)
E. Rodents and beech mast in Nukumi-daira.
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