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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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Numerical proportion of harvested (red area), survival (green area) and withered (gray area) bamboo shoots in 2013.(a) Harvest treatment and (b) control treatment.
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pone.0146228.g001: Numerical proportion of harvested (red area), survival (green area) and withered (gray area) bamboo shoots in 2013.(a) Harvest treatment and (b) control treatment.

Mentions: We harvested 66% of the bamboo shoots that were produced in the harvested plots in 2013 (Fig 1A). Because a fraction of the leftover bamboo shoots withered due to herbivory by insects or rats, 24% and 60% of the remaining shoots survived to July 26th 2013 in the harvest and control groups, respectively (Fig 1). The survival ratio in the harvested plots was significantly lower than that in the control plots (t = 2.21, P = 0.040), and harvesting decreased the number of surviving bamboo shoots by 42% (the number of surviving shoots [mean ± SE] shoots/m2; control treatment: 1.67 ± 0.35, harvest treatment: 0.67 ± 0.34; t = 2.03, P = 0.058).


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)

Numerical proportion of harvested (red area), survival (green area) and withered (gray area) bamboo shoots in 2013.(a) Harvest treatment and (b) control treatment.
© Copyright Policy
Related In: Results  -  Collection

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

pone.0146228.g001: Numerical proportion of harvested (red area), survival (green area) and withered (gray area) bamboo shoots in 2013.(a) Harvest treatment and (b) control treatment.
Mentions: We harvested 66% of the bamboo shoots that were produced in the harvested plots in 2013 (Fig 1A). Because a fraction of the leftover bamboo shoots withered due to herbivory by insects or rats, 24% and 60% of the remaining shoots survived to July 26th 2013 in the harvest and control groups, respectively (Fig 1). The survival ratio in the harvested plots was significantly lower than that in the control plots (t = 2.21, P = 0.040), and harvesting decreased the number of surviving bamboo shoots by 42% (the number of surviving shoots [mean ± SE] shoots/m2; control treatment: 1.67 ± 0.35, harvest treatment: 0.67 ± 0.34; t = 2.03, P = 0.058).

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