title: Influence of high temperature and humidity on rumen bacterial diversity in Holstein heifers.
abstract: The effect of heat and humidity stresses on the rumen bacterial molecular diversity of heifers was studied. No statistically significant changes in the rumen microbiota composition were found in the first experiment (average body mass 250kg) while in the second and third experiments (additional variables included the relative humidity and body weight), the microbiota composition was significantly different at elevated environmental temperatures and humidity. These shifts were accompanied by the decrease in concentration of short-chain fatty acids in the rumen.
authors.affiliation: National Institute of Livestock and Grassland Science, Tsukuba, Ibaraki 305-0901, Japan. ktajima@affrc.go.jp
authors.forename: Kiyoshi
authors.initials: K
authors.lastname: Tajima
authors.forename: Itoko
authors.initials: I
authors.lastname: Nonaka
authors.forename: Kouji
authors.initials: K
authors.lastname: Higuchi
authors.forename: Naozumi
authors.initials: N
authors.lastname: Takusari
authors.forename: Mitsunori
authors.initials: M
authors.lastname: Kurihara
authors.forename: Akio
authors.initials: A
authors.lastname: Takenaka
authors.forename: Makoto
authors.initials: M
authors.lastname: Mitsumori
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Kajikawa
authors.forename: Rustam I
authors.initials: RI
authors.lastname: Aminov
mesh_terms: D000818:Animals; D001419:Bacteria / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification*; D044822:Biodiversity; D002417:Cattle; D015169:Colony Count, Microbial; D004269:DNA, Bacterial / Q000235:genetics; D004275:DNA, Ribosomal / Q000235:genetics; D005232:Fatty Acids, Volatile / Q000032:analysis; D006813:Humidity; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D012417:Rumen / Q000737:chemistry / Q000382:microbiology*; D017422:Sequence Analysis, DNA; D013696:Temperature
chemical_list: D004269:DNA, Bacterial; D004275:DNA, Ribosomal; D005232:Fatty Acids, Volatile; D012336:RNA, Ribosomal, 16S