A comparison of coffee floral traits under two different agricultural practices

Prado, Sara G.; Collazo, Jaime A.; Stevenson, Philip C.; Irwin, Rebecca E.

doi:10.1038/s41598-019-43753-y

Cited by 21 publications

(21 citation statements)

References 77 publications

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“…They also observed a decrease in fresh flower weight and an increase in flower diameter, indicating a change in resource allocation as a result of shading 51 . When examining shaded and unshaded coffee plantations, Prado et al 52 also observed differences in flower morphology, but did not see a difference in nectar or pollen levels, which are key drivers of pollinating insect populations 52 . The increased floral abundance and delayed bloom timing that we observed in the partial shade (versus full sun) could be the result of reduced sun hours on photoperiodicity 48 , 49 , photosynthetic efficiency 51 , or transpiration efficiency 53 ; the decrease in soil temperature and moisture on germination 49 , root establishment 9 ; or a combination of these strategies and mechanisms.…”

Section: Discussionmentioning

confidence: 99%

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Partial shading by solar panels delays bloom, increases floral abundance during the late-season for pollinators in a dryland, agrivoltaic ecosystem

Graham

Ateş

Melathopoulos

et al. 2021

Sci Rep

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Habitat for pollinators is declining worldwide, threatening the health of both wild and agricultural ecosystems. Photovoltaic solar energy installation is booming, frequently near agricultural lands, where the land underneath ground-mounted photovoltaic panels is traditionally unused. Some solar developers and agriculturalists in the United States are filling the solar understory with habitat for pollinating insects in efforts to maximize land-use efficiency in agricultural lands. However, the impact of the solar panel canopy on the understory pollinator-plant community is unknown. Here we investigated the effects of solar arrays on plant composition, bloom timing and foraging behavior of pollinators from June to September (after peak bloom) in full shade plots and partial shade plots under solar panels as well as in full sun plots (controls) outside of the solar panels. We found that floral abundance increased and bloom timing was delayed in the partial shade plots, which has the potential to benefit late-season foragers in water-limited ecosystems. Pollinator abundance, diversity, and richness were similar in full sun and partial shade plots, both greater than in full shade. Pollinator-flower visitation rates did not differ among treatments at this scale. This demonstrates that pollinators will use habitat under solar arrays, despite variations in community structure across shade gradients. We anticipate that these findings will inform local farmers and solar developers who manage solar understories, as well as agriculture and pollinator health advocates as they seek land for pollinator habitat restoration in target areas.

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Section: Discussionmentioning

confidence: 99%

“…Angiosperms have evolved strategies to alter bloom time, length and intensity in response to environmental conditions (light, temperature, moisture) 9 , 48 – 52 . The effects of shading on flowering depend on the individual species preferences and local growing conditions.…”

Section: Discussionmentioning

confidence: 99%

Partial shading by solar panels delays bloom, increases floral abundance during the late-season for pollinators in a dryland, agrivoltaic ecosystem

Graham

Ateş

Melathopoulos

et al. 2021

Sci Rep

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“…The number of studies selected for Indonesia (n = 2) does not reflect the importance of this country in terms of world coffee production (Food and Agriculture Organization of the United Nations 2020). Both studies in USA were from Puerto Rico (Prado et al 2018(Prado et al , 2019. According to Köppen's classification (Beck et al 2018), the climates encountered in the studies were (1) Tropical-Rainforest (Af, n = 6), (2) Tropical-Monsoon (Am, n = 7) and (3) Tropical-Savannah (Aw, n = 17).…”

Section: Global Distribution Of Shade Tree and Robusta Studiesmentioning

confidence: 99%

“…In 3 out of 30 experiments, the effect of overstory trees on coffee physicochemical, physiological and photosynthetic parameters interacted with robusta clones and in some cases there were comparisons with the arabica species (Anim- 1 For C153, LB1, GG and JM2 clones, mean of % of shade with the highest plant height, collar diameter, length of main branch, crown diameter and number of plagiotropic branches is depicted 2 For 03V, 06V and 12V clones, mean of % of shade with the highest mean orthotropic and plagiotropic branch growth rate and plagiotropic branch node emission rate is depicted 3 For C153, LB1, GG and JM2 clones, % of shade with the highest number of fruits is depicted Prado et al 2019;Rodriguez-Lopez et al 2013). For robusta clone 03, leaf chlorophyll and carotenoid concentrations increased with morning shade, yet there was no effect on clone 120.…”

Section: Effects Of Shade Trees On Robusta Physicochemical Physiologimentioning

confidence: 99%

Effects of shade trees on robusta coffee growth, yield and quality. A meta-analysis

Piato

Lefort

Subía

et al. 2020

Agron. Sustain. Dev.

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Productivity of coffee plantations is threatened by both climate change and decreasing revenues of coffee growers. Using shade trees might protect against temperature variability, erosion and excessive radiation but there may be trade-offs in productivity and quality. While impacts of shade trees on arabica (Coffea arabica) have been reviewed, a global synthesis on robusta (Coffea canephora) coffee is lacking. We assessed how shade affects robusta growth and productivity, and what are the interactions and trade-offs. We conducted a systematic literature search in Web of Science and CAB Abstracts on 16 December 2019. Thirty papers fulfilled our inclusion criteria of being experimental studies on the impact of overstory trees with approximately half being from Brazil or India. Shade improved robusta tree growth and yield with some contrasting effects on physicochemical and biochemical properties. Shade (> 30%) was associated with reduced beverage quality. Significant interactions between shade and location, rainfall level and robusta clone were found. Among the clones tested, 06V, C153, LB1, GG229 and JM2 showed a higher productivity and growth (from + 17 to + 280%) under moderate shade (41–65%). This is the first meta-analysis of the effects of shade on robusta coffee. By synthesizing data from different studies, we highlight for the first time that the effect of shade on robusta coffee depends on tree age. Shade had positive impacts on older robusta trees (mean of 16 years), while the impact of shade on younger trees was either insignificant or negative. We highlight the importance of both clone type and tree ages. Research gaps included a lack of knowledge on the effects of shade with respect to coffee and shade tree age as well as interactive effects. More in-depth studies are needed to understand the mechanisms of how shade trees affect robusta coffee.

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“…Coffee shade trees also play an essential role in the life quality of insect pollinators. The total nitrogen content in coffee flower pollens protected by the shade is higher than that in coffee pollens that are exposed to light intensities [16]. The Nitrogen content in pollen may increase the life quality of insect pollinators for the sufficiency of their feed nutrition.…”

Section: Introductionmentioning

confidence: 92%

The Effect of Shade Trees in the Coffee Ecosystem to the Population and Diurnal Activity of Insect Pollinators

Supriyadi

Dzikrillah

Arniputri

et al. 2020

Int. J. Adv. Sci. Eng. Inf. Technol.

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Insect pollinators is one of the important factors in the cross-pollination of coffee flowers, which affects the coffee fruit set. However, there is still a limited understanding of how shade trees in the coffee ecosystem affect insect pollinators. The purpose of this study was to obtain information on the effect of climate variations at different shading levels in the coffee ecosystem to the population and diurnal activity of insect pollinators. The shade levels are categorized in three ways, namely high shade, low shade, and open shade. The observation was conducted at the time when the flower blooms with sample units a flower in two coffee branches. Insect pollinators that show feeding behavior in coffee flowers were recorded in the morning, while the diurnal activity of each species pollinator was observed in the morning, midday, and afternoon. The study showed five species of insects belonging to three families and two orders, Hymenoptera and Lepidoptera that showed feeding behavior on coffee flowers. Apis cerana and Apis mellifera were the dominant pollinators of coffee flowers. The difference in shade levels did not affect pollinator species to visit coffee flowers, but their population tends to decrease in the open shade, except Apis cerana. The peak of diurnal activity of insect pollinator recorded in the morning decreased at midday and showed an increase slightly in the afternoon until the end of the diurnal activity. An increase of temperature may significantly decrease the number of pollinators that visit coffee flowers, while humidity and light intensity showed no significant effect.

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A comparison of coffee floral traits under two different agricultural practices

Cited by 21 publications

References 77 publications

Partial shading by solar panels delays bloom, increases floral abundance during the late-season for pollinators in a dryland, agrivoltaic ecosystem

Partial shading by solar panels delays bloom, increases floral abundance during the late-season for pollinators in a dryland, agrivoltaic ecosystem

Effects of shade trees on robusta coffee growth, yield and quality. A meta-analysis

The Effect of Shade Trees in the Coffee Ecosystem to the Population and Diurnal Activity of Insect Pollinators

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