The group of authors is internationally recognized for their work on pollination and for the quality of that work. Specifically, Marcelo Aizen is a renowned scientist with extensive experience in the field of animal pollination.

I consider the study to be of very high quality. The authors conducted a meta-analysis using a total of 165 studies, encompassing nearly 800 individual comparisons, across 86 crops worldwide. These studies examined pollen limitation by comparing crops where pollinators are managed with those where they are not. The conclusions drawn are supported by the results obtained.

As a meta-analysis, the study compiles all existing evidence (dating back to 1950!) to date—that is, the results published on this topic up to the present day.

The authors have taken various confounding factors into account. Climatic and phylogenetic variables, as well as publication bias, were considered to strengthen the results. Furthermore, the robustness of the findings was confirmed through sensitivity analyses and simulations. Although more studies have been conducted in temperate than in tropical regions, the emerging pattern is clear.

The study shows that there is still significant pollen limitation across all crops considered in the study, with an average of 35%, indicating that there is still room for improvement in production. It is important to continue this type of research to identify vulnerabilities and ensure the long-term resilience and sustainability of crop production. The study clearly shows that, although pollen limitation in pollinator-dependent crops has decreased thanks to improvements in management and self-pollination, risks persist, and the conservation of wild pollinators remains essential for future agricultural sustainability.

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