Kreemen et al. (2002), investigated how crop pollination on farms was impacted b

Question

Kreemen et al. (2002), investigated how crop pollination on farms was impacted by proximity to natural habitat and the management type (conventional farm vs organic farm). Interpret the following graph and explain the main findings. ONorganic near natural habitats OForganic far from natural habitats CF conventional far from natural habitats a 2500 2000 1500 O 8 1000 O500 0 12 100 80 60 40 3 20 CO 6 4 2 ON OF CF Fig 1. (a) Total estimated pollen deposition by native bees SE in 2001 on ON, OF, and CF farms The gray line indicates pollen deposition for production of marketable fruit. (b) Native bee diversity (circles) and abundance (triangles) SE in 2001. The gray line indicates pollen deposition threshold

Explanation / Answer

According to the graphical data, it can be seen clearly that the extent of pollen deposition is highest in the experimental group ON i.e. organic near the natural habitats. This is corroborated with the findings that the population density of native bees is very high in this geographical location, thus aiding in pollination. Further, as the distance from the natural habitats increases and the organic features of the crop-land decreases due to increased management, the total pollen deposition also decreases. This is corroborated with the observation that the abundance of native bees also decreases in these experimental groups.

This suggests a strong correlation between the presence of pollinating bees in the area and the abundance of organic farms in the locations with their proximity to the natural habitats.

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