他们发现，经过一段时期的高营养水平环境，在遗传学上截然不同的杂交品种产生了。
They found that, during periods of high nutrient levels, genetically distinct hybrid species emerged.
肉质花兰（Cadetia kutubu）是经过长达十年的调查，在新几内亚的基科里地区发现的八个新兰花品种之一。
The fleshy-flowered orchid (Cadetia kutubu) is one of eight new orchid species found in New Guinea's Kikori region during the decade-long survey.
首先，研究者发现了一种对螨虫具有抵抗力的蜂群，将这种蜂群的蜂王置于新的蜂房中，并对它们进行更为严酷的疾病考验，经过一代又一代的筛选，存活下来的新品种的抵抗能力将越来越强。
The queens taken from these hives are then placed in new hives, exposing them to even more "disease pressure." The theory is that each generation of survivors will be hardier than the last.
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