Under this scenario, opportunistic bacteria could take advantage of the microbial shifts, colonizing and proliferating in that niche leading to an increase in richness. This explanation could fit with the greater richness estimates found in the honey bees gut raised in the Agri-env in the present study (Fig. 3a). In this line, an increase of the opportunistic pathogen Serratia marescens was reported by Motta et al. (2018) after the exposure of colonies to glyphosate, which reduced the abundance of symbionts in the community. Moreover, a balanced microbiota is an important component of colony health (Anderson et al. 2011). Therefore, we hypothesized that the differences in microbial abundances found in the present study could lead to differential pathogen susceptibility between the honey bees raised in the two environments investigated. For instance, Pettis et al. (2012) and Wu et al. (2012) observed that the honey bees fed with pollen containing Chlorothalonil were three times more susceptible to Nosema infection than controls. Coumaphos and Chlorothalonil exposure were shown to increase Bifidobacterales and Enterobacteriaceae (Kakumanu et al. 2016). In addition, a decrease in Lactobacillales, considered to inhibit the growth of major honey bee pathogens, was also noticed after the application of Chlorothalonil (Promnuan et al. 2009; Forsgren et al. 2010; Audisio et al. 2011). Likewise, Raymann et al. (2017), showed a reduction in Lactobacillus and Snodgrasella bacteria, among others, as well as an increase of infection by ubiquitous opportunistic pathogens, when antibiotics were applied to honey bees. In concordance, in this study, Lactobacillus and Snodgrasella abundances were depleted and Bifidobacterales and Enterobacteriaceae were enriched in the guts subjected to higher agricultural and beekeeping pressure. Considering that Bifidobacterium is known as a beneficial genus within the gut (Alberoni et al. 2016), its higher abundance under agricultural stressors might have been associated with the decline of other beneficial species that under other circumstances compete in the gut ecological niche with Bifidobacterium. This disruption could alter honey bee metabolisim and/or let the disproportionate growing of opportunistic pathogens like some Enterobacteriaceae (Raymann and Moran 2018). On the contrary, honey bee guts from Unije island had higher proportions of beneficial bacteria, such as Snodgrasella, Gilliamella, Lactobacillus, or Commensalibacter genera. Those bacterial groups were previously proposed to be involved in the protection against parasitic protozoans in bumble bees (Koch and Schmid-Hempel 2011), and thus, they may perform a similar function in honey bees. They also participate in biofilm formation, e.g. Snodgrasella (Beta-proteobacteria, Neisseriaceae), promoting fastening and colonization of the gut by other phylotypes such Gilliamella (Gamma-1, Orbaceae) (Martinson et al. 2012). Similarly, Kwong et al. (2017) determined that Snodgrasella alvi and Gilliamella apicola participate in immune gene expression and survival rate after E. coli infection. Frischella, involved in the immune gene expression and melanization response (Emery et al. 2017), showed a weak difference between environments in the present study, but still, were slightly more abundant in Prist-env gut samples. The higher abundances of such beneficial groups may contribute to the impressively high survival rates of the colonies investigated in the Prist-env, who lasted over 8 years on the island without beekeeping intervention but in the presence of Varroa destructor.
Massasoit and his men left the day after the treaty, but Samoset and Tisquantum remained.[67] Tisquantum and Bradford developed a close friendship, and Bradford relied on him heavily during his years as governor of the colony. Bradford considered him "a special instrument sent of God for their good beyond their expectation".[68] Tisquantum instructed them in survival skills and acquainted them with their environment. "He directed them how to set their corn, where to take fish, and to procure other commodities, and was also their pilot to bring them to unknown places for their profit, and never left them till he died."[68]
dd2b598166