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Response of a Wild Edible Plant to Human Disturbance: Harvesting Can Enhance the Subsequent Yield of Bamboo Shoots.

Katayama N, Kishida O, Sakai R, Hayakashi S, Miyoshi C, Ito K, Naniwa A, Yamaguchi A, Wada K, Kowata S, Koike Y, Tsubakimoto K, Ohiwa K, Sato H, Miyazaki T, Oiwa S, Oka T, Kikuchi S, Igarashi C, Chiba S, Akiyama Y, Takahashi H, Takagi K - PLoS ONE (2015)

Bottom Line: This means that there was no difference in original bamboo shoot productivity between treatments, and that harvesting did not influence productivity in the initial year.These results indicate that over-compensatory growth occurred in the harvested plots in the year following harvesting.This suggests that exploiting compensatory growth, which really amounts to less of a decline in productivity, may be s a key for the effective use of wild edible plants.

View Article: PubMed Central - PubMed

Affiliation: Teshio Experimental Forest, Field Science Center for Northern Biosphere, Hokkaido University, Toikanbetsu, Horonobe, Hokkaido, 098-2943, Japan.

ABSTRACT
Wild edible plants, ecological foodstuffs obtained from forest ecosystems, grow in natural fields, and their productivity depends on their response to harvesting by humans. Addressing exactly how wild edible plants respond to harvesting is critical because this knowledge will provide insights into how to obtain effective and sustainable ecosystem services from these plants. We focused on bamboo shoots of Sasa kurilensis, a popular wild edible plant in Japan. We examined the effects of harvesting on bamboo shoot productivity by conducting an experimental manipulation of bamboo shoot harvesting. Twenty experimental plots were prepared in the Teshio Experimental Forest of Hokkaido University and were assigned into two groups: a harvest treatment, in which newly emerged edible bamboo shoots were harvested (n = 10); and a control treatment, in which bamboo shoots were maintained without harvesting (n = 10). In the first year of harvesting (2013), bamboo shoot productivities were examined twice; i.e., the productivity one day after harvesting and the subsequent post-harvest productivity (2-46 days after harvesting), and we observed no difference in productivity between treatments. This means that there was no difference in original bamboo shoot productivity between treatments, and that harvesting did not influence productivity in the initial year. In contrast, in the following year (2014), the number of bamboo shoots in the harvested plots was 2.4-fold greater than in the control plots. These results indicate that over-compensatory growth occurred in the harvested plots in the year following harvesting. Whereas previous research has emphasized the negative impact of harvesting, this study provides the first experimental evidence that harvesting can enhance the productivity of a wild edible plant. This suggests that exploiting compensatory growth, which really amounts to less of a decline in productivity, may be s a key for the effective use of wild edible plants.

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Related in: MedlinePlus

Change bamboo grass density after harvesting.Red circles: harvest treatment. Blue circles: control treatment. Solid and dashed lines indicate the linear regression of the harvest and control treatment, respectively. Dotted line denotes no change in bamboo grass density between 2013 and 2014.
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pone.0146228.g005: Change bamboo grass density after harvesting.Red circles: harvest treatment. Blue circles: control treatment. Solid and dashed lines indicate the linear regression of the harvest and control treatment, respectively. Dotted line denotes no change in bamboo grass density between 2013 and 2014.

Mentions: The density of bamboo grass in 2014 was significantly higher in the plots in which the density in 2013 was higher (F1,1 = 69.02, P < 0.001, Fig 5). However, we did not observe a significant effect of harvesting in 2013 on the density of the bamboo grass in 2014 (F1,1 = 0.47, P = 0.50) or on the change in density of bamboo grass (this is shown as the ‘interaction term’) (F1,1 = 0.16, P = 0.69).


Response of a Wild Edible Plant to Human Disturbance: Harvesting Can Enhance the Subsequent Yield of Bamboo Shoots.

Katayama N, Kishida O, Sakai R, Hayakashi S, Miyoshi C, Ito K, Naniwa A, Yamaguchi A, Wada K, Kowata S, Koike Y, Tsubakimoto K, Ohiwa K, Sato H, Miyazaki T, Oiwa S, Oka T, Kikuchi S, Igarashi C, Chiba S, Akiyama Y, Takahashi H, Takagi K - PLoS ONE (2015)

Change bamboo grass density after harvesting.Red circles: harvest treatment. Blue circles: control treatment. Solid and dashed lines indicate the linear regression of the harvest and control treatment, respectively. Dotted line denotes no change in bamboo grass density between 2013 and 2014.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4697856&req=5

pone.0146228.g005: Change bamboo grass density after harvesting.Red circles: harvest treatment. Blue circles: control treatment. Solid and dashed lines indicate the linear regression of the harvest and control treatment, respectively. Dotted line denotes no change in bamboo grass density between 2013 and 2014.
Mentions: The density of bamboo grass in 2014 was significantly higher in the plots in which the density in 2013 was higher (F1,1 = 69.02, P < 0.001, Fig 5). However, we did not observe a significant effect of harvesting in 2013 on the density of the bamboo grass in 2014 (F1,1 = 0.47, P = 0.50) or on the change in density of bamboo grass (this is shown as the ‘interaction term’) (F1,1 = 0.16, P = 0.69).

Bottom Line: This means that there was no difference in original bamboo shoot productivity between treatments, and that harvesting did not influence productivity in the initial year.These results indicate that over-compensatory growth occurred in the harvested plots in the year following harvesting.This suggests that exploiting compensatory growth, which really amounts to less of a decline in productivity, may be s a key for the effective use of wild edible plants.

View Article: PubMed Central - PubMed

Affiliation: Teshio Experimental Forest, Field Science Center for Northern Biosphere, Hokkaido University, Toikanbetsu, Horonobe, Hokkaido, 098-2943, Japan.

ABSTRACT
Wild edible plants, ecological foodstuffs obtained from forest ecosystems, grow in natural fields, and their productivity depends on their response to harvesting by humans. Addressing exactly how wild edible plants respond to harvesting is critical because this knowledge will provide insights into how to obtain effective and sustainable ecosystem services from these plants. We focused on bamboo shoots of Sasa kurilensis, a popular wild edible plant in Japan. We examined the effects of harvesting on bamboo shoot productivity by conducting an experimental manipulation of bamboo shoot harvesting. Twenty experimental plots were prepared in the Teshio Experimental Forest of Hokkaido University and were assigned into two groups: a harvest treatment, in which newly emerged edible bamboo shoots were harvested (n = 10); and a control treatment, in which bamboo shoots were maintained without harvesting (n = 10). In the first year of harvesting (2013), bamboo shoot productivities were examined twice; i.e., the productivity one day after harvesting and the subsequent post-harvest productivity (2-46 days after harvesting), and we observed no difference in productivity between treatments. This means that there was no difference in original bamboo shoot productivity between treatments, and that harvesting did not influence productivity in the initial year. In contrast, in the following year (2014), the number of bamboo shoots in the harvested plots was 2.4-fold greater than in the control plots. These results indicate that over-compensatory growth occurred in the harvested plots in the year following harvesting. Whereas previous research has emphasized the negative impact of harvesting, this study provides the first experimental evidence that harvesting can enhance the productivity of a wild edible plant. This suggests that exploiting compensatory growth, which really amounts to less of a decline in productivity, may be s a key for the effective use of wild edible plants.

Show MeSH
Related in: MedlinePlus