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20 researchPublicationsAmaral Zettler, LA;Laatsch, AD; Zettler, E;Nerad, TA; Cole, J; Diaz,FC; Diaz, J; Janzen, DH;Sittenfeld, A; Mason, O;Reysenbach, AL. 2005.A microbial observatoryof caterpillars: Isolationand molecularcharacterization ofprotists associated withthe saturniid mothcaterpillar Rothschildialebeau. J. EukaryoticMicrobiol. 52(2): 107-115.Arkhipova, I; Meselson,M. 2005. Deleterioustransposable elementsand the extinctionof asexuals. Bioessays27(1): 76-85.Arkhipova, IR. 2005.Mobile geneticelements and sexualreproduction. Cytogenet.Genome Res. 110(1-4):372-82.Arkhipova, IR;Meselson, M.2005. Diverse DNAtransposons in rotifersof the class Bdelloidea.PNAS 102(33): 11781-11786.Bahr ,M; Crump, BC;Klepac-Ceraj, V; Teske,A; Sogin, ML; Hobbie,JE. 2005. Molecularcharacterization ofsulfate-reducing bacteriain a New England saltmarsh. Env. Microbiol.7(8): 1175-1185.Bordenstein, S;Rosengaus, RB. 2005.Discovery of a novelWolbachia supergroupin Isoptera. CurrentMicrobiol. 51(6): 393-398.Bordenstein, SR;Reznikoff, WS. 2005.Mobile DNA in obligateintracellular bacteria.Nature Rev. Microbiol.3(9): 688-699.Casiraghi, M;Bordenstein, SR; Baldo,L; Lo, N; Beninati, T;Wernegreen, JJ; Werren,JH; Bandi, C. 2005.Phylogeny of Wolbachiapipientis based on gltA,groEL and ftsZ genesequences: Clusteringof arthropod andnematode symbiontsin the F supergroup,and evidence forfurther diversity inthe Wolbachia tree.Microbiology 151(Pt 12):4015-4022.Degnan, PH; Lazarus,AB; Wernegreen,JJ. 2005. Genomesequence of Blochmanniapennsylvanicus indicatesparallel evolutionarytrends among bacterialmutualists of insects.Genome Res. 15(8): 1023-1033.Dhillon, A; Goswami,S; Riley, M; Teske,A; Sogin, M. 2005.Domain evolutionand functionaldiversification of sulfitereductases. Astrobiology5(1): 18-29.Dhillon, A; Lever, M;Lloyd, KG; Albert, DB;Sogin, ML; Teske, A.2005. Methanogendiversity evidencedby molecularcharacterization ofmethyl coenzyme Mreductase A (mcrA)genes in hydrothermalsediments of theGuaymas Basin. Appl.Environ. Microbiol. 71(8):4592-601.DiPaolo, C; Kieft, R;Cross, M; Sabatini, R.2005. Regulation oftrypanosome DNAglycosylation by aSWI2/SNF2-like protein.Molecular Cell 17(3):441-451.Evgen’ev, MB;Arkhipova, IR.2005. Penelope-likeelements—a newclass of retroelements:Distribution,function andpossible evolutionarysignificance. Cytogenet.Genome Res. 110(1-4):510-21.Fry, AJ; Wernegreen,JJ. 2005. The roles ofpositive and negativeselection in themolecular evolution ofinsect endosymbionts.Gene 355: 1-10.Golden, DE; Hajduk, SL.2005. The 3’-untranslatedregion of cytochromeoxidase II mRNAfunctions in RNA editingof African trypanosomesexclusively as a cis guideRNA. RNA 11(1): 29-37.Gould, RM; Morrison,HG; Gilland, E;Campbell, RK. 2005.Myelin tetraspanfamily proteins but nonon-tetraspan familyproteins are presentin the ascidian (Cionaintestinalis) genome. BiolBull. 209(1): 49-66.Greenberg, RM. 2005. AreCa (2+) channels targets ofpraziquantel action? Int.J. Parasitol. 35(1): 1-9.Herbeck, JT; Degnan, PH;Wernegreen, JJ. 2005.Nonhomogeneous modelof sequence evolutionindicates independentorigins of primaryendosymbionts withinthe enterobacteriales(gamma-Proteobacteria).Mol. Biol. Evol. 22(3):520-32.Kolker, E; Picone,AF; Galperin, MY;Romine, MF; Higdon, R;Makarova, KS; Kolker,N; Anderson, GA;Qiu, XY; Auberry, KJ;Babnigg, G; Beliaev, AS;Edlefsen, P; Elias, DA;Gorby, YA; Holzman,T; Klappenbach, JA;Konstantinidis, KT;Land, ML; Lipton, MS;McCue, LA; Monroe, M;Pasa-Tolic, L; Pinchuk,G; Purvine, S; Serres,MH; Tsapin, S; Zakrajsek,BA; Zhou, JH; Larimer,FW; Lawrence, CE;Riley, M; Collart, FR;Yates, JR; Smith, RD;Giometti, CS; Nealson,KH; Fredrickson, JK;Tiedje, JM. 2005.Global profiling ofShewanella oneidensisMR-1: Expression ofhypothetical genes andimproved functionalannotations. PNAS102(6): 2099-2104.Kysela, DT; Palacios,C; Sogin, ML. 2005.Serial analysis of V6ribosomal sequence tags(SARST-V6): A methodfor efficient, highthroughputanalysis ofmicrobial communitycomposition. Env.Microbiol. 7(3): 356-364.Lee, WJ; Simpson,AGB; Patterson, DJ.2005. Free-livingheterotrophic flagellatesfrom freshwater sites inTasmania (Australia),a field survey. ActaProtozoologica 44: 321-350.van Luenen, HG; Kieft, R;Mussmann, R; Engstler,M; ter Riet, B; Borst, P.2005. Trypanosomeschange their transferrinreceptor expression toallow effective uptakeof host transferrin. Mol.Microbiol. 58(1): 151-65.Mark Welch, DB. 2005.Bayesian and maximumlikelihood analyses ofrotifer-acanthocephalanrelationships.Hydrobiologia 546: 47-54.Mark Welch, DB;Mark Welch, JL. 2005.Genomic approachesto rotifer ecology.Hydrobiologia 546: 101-108.Mehta, MP; Huber,JA; Baross, JA. 2005.Incidence of novel andpotentially archaealnitrogenase genes in thedeep Northeast PacificOcean. Environ. Microbiol.7(10): 1525-34.Messerli, MA; AmaralZettler, LA; Zettler, E;Jung, SK; Smith, PJ;Sogin, ML. 2005. Lifeat acidic pH imposesan increased energeticcost for a eukaryoticacidophile. J. Exp. Biol.208(13): 2569-2579.Murray, S; Jorgensen,MF; Ho, SYW; Patterson,DJ; Jermiin, LS. 2005.Improving the analysis ofdinoflagellate phylogenybased on rDNA. Protist156(3): 269-286.Noel, C; Dufernez, F;Gerbod, D; Edgcomb,VP; Delgado-Viscogliosi,P; Ho, LC; Singh, M;Wintjens, R; Sogin,ML; Capron, M;Pierce, R; Zenner, L;Viscogliosi, E. 2005.Molecular phylogeniesof Blastocystis isolatesfrom different hosts:Implications for geneticdiversity, identificationof species, and zoonosis.J. Clin. Microbiol. 43(1):348-355.Palm, D; Weiland, M;McArthur, AG; Winiecka-Krusnell, J; Cipriano, MJ;Birkeland, SR; Pacocha,SE; Davids, B; Gillin,F; Linder, E; Svard, S.2005. Developmentalchanges in the adhesivedisk during Giardiadifferentiation. Mol.Biochem. Parasitol.141(2): 199-207.Polaszek, A; Agosti, D;Alonso-Zarazaga, M;Beccaloni, G; de PlaceBjørn, P; Bouchet, P;Brothers, DJ; Cranbrook,Eo; Evenhuis, N;Godfray, HCJ; Johnson,NF; Krell, F-T; Lipscomb,D; Lyal, CHC; Mace, GM;Mawatari, S; Miller, SE;Minelli, A; Morris, S; Ng,PKL; Patterson, DJ; Pyle,RL; Robinson, N; Rogo,L; Taverne, J; Thompson,FC; van Tol, J; Wheeler,QD; Wilson, EO. 2005.A universal register foranimal names. Nature437(7058): 477.Roland, S; Bahr, M;Olendzenski, L;Patterson, DJ. 2005.“Switch onmicro*scope.” TheScience Teacher 47-49.Schaber, J; Rispe, C;Wernegreen, J; Buness,A; Delmotte, F; Silva,FJ; Moya, A. 2005.Gene expression levelsinfluence amino acidusage and evolutionaryrates in endosymbioticbacteria. Gene 352: 109-117.Serres, MH; Riley, M.2005. Gene fusionsand gene duplications:relevance to genomicannotation andfunctional analysis. BMCGenomics 6(1): 33.Sheehan, KB; Patterson,DJ; Dicks, BL; Henson,JB. 2005. Seen and Unseen,Discovering the Microbesof Yellowstone. Nashville,TN, Falcon Press.Shiflett, AM; Bishop,JR; Pahwa, A; Hajduk,SL. 2005. Human highdensity lipoproteinsare platforms for theassembly of multicomponentinnateimmune complexes.J. Biol. Chem. 280(38):32578-32585.Toaldo, CB; Kieft, R;Dirks-Mulder, A; Sabatini,R; van Luenen, HGAM;Borst, P. 2005. A minorfraction of base J inkinetoplastid nuclearDNA is bound by theJ-binding protein 1. Mol.Biochem. Parasitol. 143(1):111-115.Weiland, ME; McArthur,AG; Morrison, HG;Sogin, ML; Svard, SG.2005. Annexin-likealpha giardins: A newcytoskeletal gene familyin Giardia lamblia. Int. J.Parasitol. 35(6): 617-26.Wernegreen, JJ. 2005. Forbetter or worse: Genomicconsequences ofintracellular mutualismand parasitism. CurrentOpinion in Genetics &Development 15(6): 572-583.Wilson, JY; McArthur,AG; Stegeman, J. 2005.Characterization of acetacean aromatase(CYP19) and thephylogeny andfunctional conservationof vertebrate aromatase.Gen. Comp. Endocrinol.140(1): 74-83.
esearch 21the ecosystems centerCO-DIRECTORSJohn E. Hobbie, Co-DirectorJerry M. Melillo, Co-DirectorSENIOR SCIENTISTSLinda A. DeeganAnne E. GiblinJohn E. HobbieCharles S. HopkinsonJerry M. MelilloBruce J. PetersonEdward B. RastetterGaius R. ShaverASSOCIATE SCIENTISTSChristopher NeillJoseph J. VallinoSENIOR RESEARCH SCIENTISTPaul A. SteudlerPROGRAM DIRECTOR, SESKenneth H. ForemanRESEARCH ASSOCIATESBenjamin FelzerDavid W. KicklighterRobert M. HolmesRoxanne MarinoJames W. McClellandPOSTDOCTORAL SCIENTISTSJonathan P. BensteadJennifer BowenLaura C. BroughtonJoaquin E. ChavesDeanne DrakeLora HarrisJacqueline E. MohanContinuedThe Ecosystems Center was founded in 1975 as a year-round research program of theMBL. Its mission is to investigate the structure and functioning of ecological systems andto predict their response to changing environmental conditions, to apply the resultingknowledge to the preservation and management of natural resources, and to educateboth future scientists and concerned citizens.The center operates as a collegial association of scientists under the leadership ofco-directors John Hobbie and Jerry Melillo. Because the complex nature of modernecosystems research requires a multidisciplinary and collaborative approach, centerscientists work together on projects, as well as with investigators from other centersat the MBL and from other institutions, combining expertise from a wide range ofdisciplines. Together, they conduct research to answer a variety of questions at field sitesranging from Arctic Alaska, Sweden, and Russia to Brazil, and from the temperate forestsof New England to the estuaries of the eastern United <strong>State</strong>s.Nitrogen loading from septic systems to Cape Cod’s Waquoit Bay has been an increasingconcern as algae blooms continue to blanket large portions of the estuary. Recently,Ecosystems Center scientists Joe Vallino and Ken Foreman and colleagues have beenstudying the results of the installation of a permeable reactive barrier (PRB), composedprimarily of wood chips, that could act as a filter to remove the high concentrations ofnitrate through the process of denitrification. Nitrate removal since the installation oftwo PRBs in the fall of 2005 has been measured at almost 100 percent.Although the barriers are currently performing denitrification, they are also beinginundated with salt water on a regular basis rather than the periodic salt-waterinundation from storms that scientists had anticipated. Consequently, the highconcentration of sulfate in seawater, coupled with low oxygen concentration in thePRBs, has led to sulfate reduction, which forms hydrogen sulfide. However, our recentmeasurements show that total nitrate removal does not appear to be impacted by thepresence of sea water.To understand the nitrogen cycle in the soil, center scientist John Hobbie and hiscolleague son Erik Hobbie invented a method to calculate the transfer of nitrogen fromsoil fungi to plants using data on the abundance of nitrogen isotopes in mushroomsand plants of the Arctic tundra. The heavy nitrogen, or 15-nitrogen (15-N), is reducedin abundance compared with regular nitrogen, 14-nitrogen, when mycorrhizal fungi inthe soil take up amino acids from the soil and transfer these to small trees and shrubs.Nitrogen transferred from fungi make up 60 to 90 percent of the plant nitrogen at ToolikLake in Alaska, site of the center’s Long-Term Ecological Research project. This approachwas developed for use in Arctic ecosystems but will be useful for the study of plantmycorrhizalfungi relationships in other ecosystems.
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